Another poster here got me to looking at a new seat fabric site-
https://www.etsy.com/shop/TheEstateStash
and they also have vinyl and headliner material -
https://www.etsy.com/shop/DeadstockAutoVinyl
I don't see the exact Suburban material but there is lots of similar
period correct stuff. Some are close on the color, texture, perforated, and wide enough (~60"). This could be an excellent 2nd choice until someone finds the 100% correct stuff.