I have only met one other person, a photographer from England, who has this format camera. I believe I mentioned buying film from Wephota (near Magdeburg in Germany) for a very reasonable price of EUR 80,00 for 25 sheets of ASA400 film, cut to order.
I just got back from my cabinet makers shop. He made 4 new lesboards, three of which are blanks, and the fourth has been fitted with the retaining ring from my Apo-Ronar 600mm lens.
Just for information, he charged me EUR 50,00 for the work. All handmade with a beautiful finish.
Here is how they turned out...