update, the amazon link won't work, this is what its called if you want to search it, "
MERWOF Upgraded 100W Bumper Repair Kit Plastic Welder Machine, Hot Stapler Gun Plastic Welding Kit with 400PCS Hot Staples & Smoothing Tip(Red)"
I repaired mine with one of these plastic "welder" guns. Mine wasn't ripped off but was flopping around. You put a small metal tab in the gun that you then melt or 'weld' into the injured area, which gets now reinforced with a small piece of metal to span the weak or broken plastic. The metal tabs that stick out, I used a grinder to smooth out, then melted the plastic around it so you can't see the metal tab. Its strong and works great. If the tab were broken off, I'm not sure how you would fix it without buying a new one.