I am searching for a '93 or equivalent compatible JBL factory radio tape player. My car has the optional CD player. Both units work, but the volume is very low and it won't tune many radio stations. The CD player works and gets more audio volume than the radio but also not very loud. When I make adjustments to the volume, bass, fade or balance controls I get a loud popping. Does anyone know where I can find a used replacement or repair for the head unit? I will also try to reach out to Dan Barbush as stated above.