Have you tried stores like Lowes, Home Depot or Walmart?
Go online and look if you don't see any in stores. They are rather costly. I need some myself.

I googled for what you talked about, and I found The Colonial Furniture House. you could contact them. Or maybe someone in Amish country might have some ideas.

I was looking all over town last year (end of the summer.) It is really hard to find some that are actually thick enough to coushion decently. I finally found the perfect coushions at SHOPKO and the were on clearence.
That was last year!
This year I have found some at T J Max. You are looking for a lot of them, so good luck!

Try an auto reupholstering shop if there is one near you. They can make them any size.

Sue

Check Big Lot's and Fred's if you have those stores near you. Reasonably priced but can't vouch for quality, altho' the looked about the same as others I've seen.

Suzi

I got my cushions for a wicker-like loveseat and 2 chairs from a place in North Carolina. This is their fourth year and they've held up great. They're thicker than the ones I've seen at Target and other places. Suzi suggestion of Big Lots might be a good place to look if you have one close. They're on sale this week.

This is where I got mine.

Here is a link that might be useful: Patio Cushions

Home decorators has a lot of cushions - sunbrella fabric and others.

I like Gardeners Supply. They have a large choice and are not exepensive compared to many other businesses.

Here is a link that might be useful: Outdoor cushions at Gardeners Supply

THe cushions are to shape of chair.Like the couch has 3, top rounded withstraight on one side then middle is square but rounded corners then 3rd one is same as orther end only goes to right.Tofit chair.I paid alot for this furniture.Im afraid the cushions I saw wont look right.Does anyone know is pa house out of business?

Saw a commercial yesterday on Custom Outdoor & Indoor Cushions.So I saved the site.Hope this helps:

Here is a link that might be useful: Cushion Source:

Like these Bulldinkie?
I had a hard time finding them with the side arms or what ever you call them! LOL
The Napa Collection has these "arms" you are talking about. So many are just square ended.

Here is a link that might be useful: Wicker Paradise

I went to Ross this week (they have a 10% over-55 years old discount every Tuesday) and I saw lots of cushions for outdoor furniture at good prices.

Here's a link to locations in Pennsylvania:

Here is a link that might be useful: Ross locations in PA

Thanks for your help everybody,I like the ones you said to look at Nodakgal..thak you

I hope you find some BD. They have some beautiful fabrics to choose from in that Napa Collection!