Want to Buy Welta 9x12 plate holders and sheaths for 3-1/4x4-1/4 film

I'm constantly on the lookout for good condition 9x12 plate holders for my Welta plate camera (Watson). I also am seeking a nice stash of sheaths, Kodak or similar, for using film in 9x12 holders.

danmouer@fastmail.fm

I'd like to update this old post, because I'm still searching for more plateholders for my Welta. The correct ones are approximately 10x14 cm. with a thin single flange along the lateral sides, but no flange on the bottom. They don't have a registering "lip."