I've got this Horseman graflok frame, its off one of their monorail cameras, its basically the bit where the film holder sits, complete with graflok sliders etc. I was keeping hold of it for using it as a film back on some possible DIY camera but never got round to doing anything with it. Someone else would be better of having it.
I'll try and dig out a bigger photo when I get home, but it looks like this:
Is this any use to anyone at £20 plus postage? Or make us an offer.