I have recently ordered a nice hood for my new-to-me Mamiya C220. The hood is in a great condition, but the tiny screw used for tightening the hood on the lens is bent and cannot be used. As a result the hood does not stay in place. Does anyone know where to find a replacement? More specifically, does anyone know the size, thread and length of the proper screw? Does it have a specific name? I hope it is not something custom designed for Mamiya, but so far I could not find any information. I don't have the tools to measure it myself I am afraid. Thank you!