I'll hopefully be getting the 9x12's made in about 3 weeks, when I'm back in the UK. PM on it's way goldie
There's a lot of skills out there in the community we don't think about tapping into, or even appreciate are there. When I bought my first LF camera a De Vere a leaf spring on the back was broken, my father took it to work -n the new springs ere better than the originals.
Ole, for other sizes I would ideally need some scrap film & a plate holder, but in reality you should already have access to engineering workshops that could make them for you.