I have a double tent cot that I bought on Amazon last year. Used twice. It has the original style cross bars rather than the newer dinky accordion mechanism. Like new and includes the rain fly. I originally bought this to use as a RTT, but will be going with a popup trailer instead.
I'm based...
Just saw this on Kickstarter. Looks like a good idea. I've got no affiliation with the project owner. He's selling these for $210 a pop for a pretty solid looking product. Seems like something you could diy in black pvc for a reasonable price...