Best place for holders is German ebay.de just remember login details are the same for all ebays it's a common database. I've just let 4 good Linhof style holders and a nice dual format Rollex back go for the cost of similar but to fit my own 9x12 cameras. Surprisingly even the worst rust seems to clean of easily from these plate holders. The APUG sponsor Fomafoto is the best source for 9x12 film, very fast.
Originally Posted by Barry S
Yes these old Reflex cameras are rather addictive, I seem to have gone from 1 to 5 in 6 months, 2 6x9's - an Ensign Speed Film Relflex, and a Thornton Pickard Ruby, two Quarter plate Dallmeyer Press (Ensign rebadged) and TP Ruby, plus the postcard sized Compact Graflex