Want to Buy WTB: Sinar F2 5x7 rear standard

[cdholden]

I'm looking for the F2 5x7 rear standard.
I already have a bellows and the film back, but will consider offers of a format changing kit.
Optimally, I just need the back. Let me know if you are willing to part with yours.
I can trade for lenses, cameras or cash.

Thanks,
Chris