Are the sheaths really that rare? I've found 9x12 sheaths / plate holders fairly easy to come by, I've only been looking a few months.

On the other hand, I've been looking out for 13x18 for a kind soul who helped me out with 9x12 gear, and 13x18 Zeiss / Ica gear really does seem rare. If anyone has any unused, contact me and I'll pass the info along.