A good while back I caught the air dam of my car on one of those standalone curbs that's supposed to tell you when you're all the way in a parking space. Anyway, when I backed out, it ripped the air dam slightly. But it's all one unit with the front bumper, which means that it's really expensive to replace.

So I'm looking to fix it myself. I was initially thinking that I could excise the piece of plastic at the nexus of the rip that keeps it the two pieces from lying in the same plane and then screw or bolt on a patch to hold it steady. But then I thought that it might make sense to ask here.

Any ideas?