Where do you buy window strips for post war heavyweight passenger cars?

I am looking for replacement window strips/film for the 652/653/654 postwar S gauge heavyweight passenger cars. These are the strips that are partially clear and partially yellow. but no silhouettes.

My go-to is eBay, but there are none listed there.

In the past, I have ordered AF parts from different vendors, but often their websites do not allow ordering directly. I have to call the vendor and order over the phone.

Does anyone here have a favorite AF vendor that they like and use? Can they take orders over the Internet?

Thanks