Where to find old pull down backdrops?

[Cinka]

I've been looking all over and can't find anything. Hopefully someone here can help.

I'm looking for old (vintage) pull-down backdrops like the ones used in the 70's and 80's at places like JC Penney Photo Studio and KMART. Does anyone have any idea where I can find these? I checked online and on eBay. Nothing.

Thanks!