I'm looking for a CAMBO 8x10 lens board; it can be a 8x10 > 5x7 or 8x10 > 4x5 reducing back. I want to use the 8x10 board to mount a 5x7 split back. Even better if the board has had the 5x7 or 4x5 part removed. Basically, I just need the the metal back and will enlarge the hole and bolt a 5x7 split back from 5x7 Rembrandt.

Regards, Bogdan