[Yaesu] MH-27 Mic DTMF inop

[LHOTP at ATT.NET]

The DTMF on my MH-27 microphone is intermittent/ weak at best; voice 
reports are A-OK, so I assume the problem is isolated to the DTMF 
portions of the circuit board.  I looked online and found that one 
likely bet is aged capacitors.  I don't have the skills to R&R the 
capacitors myself.  The mic is attached to a FT-2500M, if that matters.

Does anyone know of a place to have it repaired for a reasonable price?  
I'd rather not spend more than about $30 to fix it when a new 2m is 
barely four times that price. 

Jon KE5WGZ