I purchased my Electro 35 GSN at a flea market for a song. I love it. However, after several trips in the carry-all bag it has developed an issue where the "scene select" ring is loose. Through this looseness I believe there is a light leak to one of the inner elements of the lens groups. Is there a lens hood or other something that I could use to fix my weak lens issue? I'll never find another one for the price I paid. I could try to tape the lens back together. It's really just the plastic housing on the outside of the lens. Thoughts?