I've got a spare Fuji dark box (more like a tent on a frame) that I need to get out of my office. $40 plus shipping. It's in fair condition. One of the hinges has started to work loose but otherwise should be fully functional. This is great for loading tanks, film holders, etc. It's not lightweight (don't take it camping) but it is roomy inside and should accommodate just about any format.
I've purchased two of these in the past. While I wouldn't take them backpacking, I would take them camping. Or any trip where I needed a film loading room. Lots of room. Probably the ultimate changing bag. Sets up and tears down in about 10 seconds and much better than a Harrison tent or Calumet changing room IMO.
No, the cloth appears to be intact. I haven't actually used this one (kind of an accident that I ended up with an extra), but I don't see any sign of tears or light leaks.