Replace metal (noisy) neck strap connectors A77?
Something like this would work --
you might just print this page, bring it to a hobby type store, and get something similar. You could just tape off the Camera, and apply it with a small brush or something similar. Another avenue may be an auto parts store. They sometimes sell "dippable" plastic coatings for Tools, I.E. plier/prybar handles, etc.