Norton,there are many independent repair/modify places around,these days.Some quite dependable.Why not try some of these?
I do know a guy in NYC named Lewis Mansky,who is "expert" at much of this stuff.He could be of help,if you are nearby.He is very capable,and an extremely nice guy.I believe he is very reasonable in the stuff he does.
I have not spoken to him in a while,and only bump into him at trade shows these days,but you should be able to look him up,if you so desire.
Best.