I recognise that backdrop. It's the Amphi backdrop prop by 3dCritter. I searched for it in the MP but I don't think it's available anymore. 
Which is a shame, I bought it and use it all the time. It works great with almost any scenic photo.
Probably a victim of the ware house / clearence policy. 
Try  emailing him. Maby he can work something out for ya.