Hi, try locating either Meopta or Kiev one. Meopta is from Czech Republic, Kiev from Ukraine. It's in burried the closet currently, so I can't give you the exact name. It's 6x6, and cost me the equicalent of 20$ used. If you are in Europe, look around for them, they are cheap in the east. And quite good, especially if you hack a high-quality lens to it.
Good light!
fra
