Sounds like a bunch of diodes got fried. Keep in mind radio front ends are used to dealing with signal levels in the
microvolt range. Injecting 75 watts of RF from 10 inches away most likely sent three, four or more orders of magnitude of voltage down the line. Not good.
There are commercially available notch filters but I don't know if they would knock down the RF sufficiently.
Repeater duplexers would certainly work but then your trunk would be full of cans!
