I have done some futzing on a grip set, but I'm at the point where I need the service of someone who can finish the job without ruining it. What I need done is not "major surgery." It includes adding a tiny amount of the material to correct a spot where I was enthusiastic.

Please identify people who repair or alter rubber (synthetic rubber??) grip sets.

Maybe it would help to be more specific about details of the grips and the problem. Including pictures of the grips and the damaged area.