I recently received a calumet view camera as a gift that is almost ready to use. The clip on the front standard (that holds the lens in place) was broken off. The screw heads were broken and the studs still remained stuck. I removed the studs but now I am at a loss for how to determine the size of the screws to order a replacement. They are tiny so I do not believe home depot/lowes would have these in store. If anyone has any ideas it would be much appreciated!