Thanks to StinkyFast for pointing me in the right direction. Japan Electronics 4678 Main Street, one block South of Cowell Motors on the opposite side of Main.
Installed a headphone jack in my Radar Detector for $30 (StinkyFast got it done last year for $20). They originally wanted $40.
Works like a charm. No need to look at the detector anymore, and got 4 traps today. Earbud from Radio Shack $5.