Does anyone have any places in the US that they would recommend that can diagnose Custom IEM problems/do repairs? I have a pair of custom reshelled TF10's (from LEAR in HK, stay away from them) and one of the ears stopped working, and LEAR doesn't have any warranties for repair nor are they...

Hey guys,   I realize this may have come up fairly often, but I'm looking for a decent IEM for under $50 that I can take to the gym. Preferably that budget or lower because I don't really want to take anything more expensive to the gym, where I'll sweat all over it. Here's a few of my...