Hi! I have a lens I purchased for a new-to me view camera but the lens board isn't the right size for the lens. I'm needing a copal 1 (outside dimensions 4"x4"). the lens is more the 42mm opening and the one on the view camera is too small so I'm guessing it is a 0 copal. I've looked over ebay but haven't seen one that looks like it would fit my camera. Thanks for any help or suggestions. I'm new to LF photography (even though I've had a 4x5 graflex crown graphic here for a few years in a box waiting on me).... I am now finally jumping in with two feet!