jdef, I know there is a 10 1/2, 18, 24. You might want to try the lens repro in NY, midwest, or classic camera. I dont have the URL's for these sites but you can easily find them in View Camera magazine.
jdf, I know this post is over 3 months old and you probably have already got your answer but, I have a Turner Reich 12/19/25 and I know there were several other sizes.
I haven't made any pictures with the TR yet. What do you think of the one your using?