[T Scott]

Go with Lebaron Bonney without a doubt. These people are top notch. I had them make a kit for my A coupe using material I sourced elsewhere since I didn't want wool which was original but requires more care. They did the seat for me in their shop but the rest I installed myself. Now I have never upholstered a car before but this kit went in unbelievably well and fit with no gaps, wrinkles, or anything that would suggest an amateurish installation.
As to roadster tops, I observed while in their facility, that their tops are cut and fitted to a fixture not unlike a set of top bows to insure a proper shape. I think some of the other suppliers just cut and stitch on the dotted line which sometimes works and sometimes doesn't.