What's everyone doing for vbelts if you're looking for concours correct? It seems like everything is cogged today. I know Thornton makes ones that are Old specific, but does anyone know of anything similar for Buick? I get Buick is niche, but so is Olds.
Or try @mrolds69 - He seems to have a good NOS stash. They come op on eBay too. I thought there was a source for new non-cogged as well. Maybe have been an AG supplier.