Mine are falling off (broken) whats the best thing to glue them back with or should I just let the dealer have it?

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'99 Mystique GS ATX
K&N Glasspack & Flowmaster
UDP(still in box)
15" AR Carerra's
Alpine Sony & JL Audio Sounds (weapon-r on the way)
"for when 109 aint so fine" 83 Jag XJ6


'69 Chevelle SS
'99 Mystaque GS