I have a old 80-200 f2/8D two touch. It was dropped and hit the ground on the lens mount. Looks a little ugly around the plastic where it was scruffed but after some cleaning everything seems to work fine except the lens is just a little tighter then normal to twist onto the body. I'm thinking of getting the lens mount replaced. Anyone know of a good reliable person/company to work on lenses? Is it better to go through Nikon? Or are there cheaper alternatives? Anyone have any idea how much it would cost to get the F-mount replaced on the 80-200 2.8D?