Hi Dan -- All the rubber in the elastic had gone bad, so the curtains on our '74 Argosy were toast when we got it about 4 years ago. I don't know if it's possible to find temporary curtains. The sliders change just a little bit over time -- causing an additional difficulty. But the question is still posted and open to responders.
(Tammy) joined here and then started a home business making curtains for Airstreams -- something to consider when you get to that point. Ambruso drapes in Florida does the same thing but is very expensive.