I have a very retro, small pull-out sofa (50" x 33"). It needs a mattress (single sized), as I threw out the old one due to poor condition. The sofa itself is in good condition.
It's brown plaid, with wooden accents and ruffles at the bottom. And it can easily be covered by a queen/king-sized sheet, if plaid's not your cup of tea. :0)
Call me @ 802-318-2154 if you're interested!
p.s. I posted a picture of the sofa in the Photos section of groovyuv.com. - L.J.