Plastic bumpers are a real snagglepuss to repair but it can be done, and for less than your deductible, this Instructable by Popular Mechanics tells us.
One of the main things to consider is which type of plastic your bumper is. There should be a stamp inside identifying it as PP, PPO, TPE, PUR, or TPUR. The adhesive products you purchase will have to match up and you should check with the store to make sure you’re getting the right ones.
The procedure looks moderate to advanced in difficulty, but sure beats forking over that dough.
Plastic Bumper Repair [Instructables]