Thanks Helen.

So far from googling, these are the most promising for me: https://www.jeld-wen.com/en-us/products/interior-doors/flush-wood-composite/flush-bifold

Although they are not solid, I'm guessing they are better quality than what I have now. Maybe it's really the hardware that is bothering more, actually 3 out of 6 are off track...so I will replace both the doors and the hardware at the same time.

My closets weren't a standard width so they did the doors custom. I can't imagine it is a major thing to make the door itself which is essentially a slab of solid wood. The skill would be the installation of the hardware, the tracks and the actual installation of the door itself so that it works properly.

Since the guy had already done far more complicated projects for my remodel including my stripper pole television cabinet/room divider as well as all of the cabinetry for office, kitchen and bathrooms, the doors themselves were a no brainer. He also did my interior doors with Lamina and my mullion design for far less than an off the rack Trustile door.

Yeah as I google a bit more the 'issues' are coming into focus. Brands like Trustile are upscale but seem to focus on interior doors generally, not closet doors. They don't quite make anything 'cheap' enough in the sense of being thinner than regular room doors. I think I would be fine with thinner flush doors like 1" or even 3/4", I don't have kids or dogs in the house. But I would like an MDF or OSB/plywood core, with a choice of optional veneers. Still haven't found a company like that.

There are various companies that pop up in google like this:

https://www.millworkforless.com/interior-doors

but they only seem to have panel doors, not true flush doors. Also they seem to share pictures so I think they are all franchises of some other outfit.

post a pic of the room and the doors. have you tried polishing what you have? some 0000 steel wool along w/cream BarKeepers Friend, or Brasso, should make those look brand new

I need to see what you have and the space this is not a simple thing with no context no real help can come. I live in a 1956 MCM ranch the closet doors are not great they never were it was not a huge issue in 1956 I assume. In fact ours were all bypass sliding doors very simple and ours were made from the same material as the wall panelling..

Beth it isn't a matter of the finish - it's a matter of them 1) being hallow so feeling super cheap 2) the panels and mullions colonial/traditional look, when the rest of house has a MCM aesthetic including the original, flush interior doors and 3) the cheap bifold hardware where about half them have popped out of the track. The Johnson hardware system looks SUPER heavy duty. If I could just get the panels made to order somewhere, I think I could handle getting the hardware added myself. I'm pretty crafty at this point. So at this point it's not so much a matter of buying "doors" per se, I just need a manufacturer who will 1) cut a piece of MDF to your size spec and 2) veneer it to your spec

It's interesting how flush doors are harder to find than solid ones...and while there are plenty of solid panel doors out there, there are not many solid flush doors. Solid flush doors are probably way more common in commercial buildings, where they are often just steel of course.

I am not a pro but based on the "custom" doors I have, why not go to a good lumber yard and have them cut wood to your specifications.

I am pretty certain that my doors are just that. In fact the portion that is exposed in the middle was not sanded as they forgot that portion and my GC then finished the sides. I just measured and their thickness is a bit less than 1 1/2".

Again I am not a pro but I am almost certain they started out their "life" as just planks of wood. Mine are painted to blend in since I have a lot of stained white oak cabinetry and I didn't want major wood tone closet doors so I assume they are just some form of solid plywood.

I could probably do that but I want them to be solid MDF with an attractive real wood veneer, maybe even something slightly exotic like a tropical hardwood...that is probably beyond the skills of a typical lumber mill. One of those would probably be fine, but expensive, if I just wanted solid hardwood, which is what yours probably are.

I found a maker of custom veneer panels for an assortment of uses, sent them an email so will see what they say.