Same problem . . .
Different solution . . .
I used abt. 1/2" wide Black self adhesive Velcro tape (the hard loopy side) on the OUTSIDE of the trunk around the base.
This is not as obtrusive as it sounds and has been there now probably 4 years. Trunk registers hits perfectly and  remains undamaged.
Cost Fanny Adams.
Pinprick is a happy camper.