Try Ganahl's Lumber. Actually talk with someone in the windows and doors department and tell them what you are looking for. I bet they can help you out.

I am in a 50s house and wish my head had been on straight to select 3 panel. There were slabs when I moved in which created nothing in the way of decor personally and seemed drab or out of place. The panel doors I did choose brightened up the house and made everything feel clean/open. The only problem I had was with one opening requiring reworking the hinge placements on the frame. A first door was ordered with the frame and a total pain to install because of plaster walls, dealing with trim, angles, etc. I decided just to order the doors since the existing frames were smooth and sturdy. They fit easily into the frames and no adjustments needed. Suspect they were reframed at some point as I did not have any issues with angles or fit. You have a ton of options, the 50s tend to stay on standard sizing. With a blank slate as you mentioned, easy to go in the direction of your style. Although I wouldn't go towards too much design. A 3 panel would look great, which is where I wanted to go. A personal take as my one level cottage doesn't feel like it could take on arches. Even though it does have wall entries with arches. As for the exterior match, there are a number of threads which have mentioned this. The exterior of your home would be part of the deciding point. I have a front door sitting for install. It is a used solid wood door in perfect condition with a Speakeasy in it. 20s, Southwestern style? Still intrigued with it. I know the interior look will work, not sure about exterior. Far from the 50s, but these houses do give us some leash for decor inside and out. If you still have the original hardware, hang on to them. I changed all and now wish the solid aged brass was kept.

@Terri Wilson We did a pretty large order of axstad too. $13,000 which was available over several months. Definitely delayed during a pandemic. I posted my old kitchen and was advised to check out the axstad and after going to several cabinet/ kitchen companies and seeing what we could get it, it was an easy decision. Getting an experienced installer to do the customizing we wanted has been a challenge as well, but we are in the thick of it right now. I think we will love it when it's done. We are also replacing a large upstairs cabinet, 2 built in hutches and a laundry room, several with base cabinets that needed to be cut to fit the proper depth. Good luck with your project.

I'm going to guess that I am a little late for the original post...but here's my opinion. I am very disappointed in my Reeb interior doors. I installed the MDF 4 panel shaker panels. The panel itself looks nice, but the mortising for the door latch is the worst I've ever seen. You can see where the router got away from the worker and went outside of the designed mortise. Even the better ones were a 1/16"-1/8" larger than it should have been. The doorstop was tacked on wherever it fell. I understand that it should be adjusted to the panel when installed, but the reveals were way off and it was bowed. For many, I had to pull it off and start from scratch. There were also many pieces that were dented and gouged. These doors were for my personal house, but I am also a contractor that has set many, many doors. For the money, they are very poor quality doors and I would look for another brand. If they were priced as a discount door I might understand, but they aren't.