Hi Stephen
I have no idea if this is relavant, but I bought a beautiful vintage Beseler 23II on ebay for a song. I have the old dear up & operational in my new little darkroom, now. It came with negative carriers for both 35mm & the medium format films. In the class I took, we made carriers for slightly larger format film. I have seen 67s on ebay as well.
Ebay is like every other bargain basement... you really need to do some digging to get the gems buried in the fluff! But it never hurts to look! Besides...there is the adrenaline rush to consider! haha
But, I am a born-to-shop, bargain-hunting kinda gal!