That really sucks!!! I know how you feel, I did the same thing (Well kind of)!!!!!
We've been getting really crappy weather lately and my yard is nothing but a big ice rink.... As I was pulling in my driveway about 3 weeks ago, the XRS slid and ran right into a snow bank... Well not a snow bank but an ICE bank.... Caved in the driver side pretty nicelly (about 4-5 inches) and popped all the clips olding the front (which the dealer replaced).
Went to the dealer and he initially said I was really lucky since I just popped the clips but upon further inspection he realized I had actually cracked the front but you can't see it as the split is right under the driver side front spoiler piece (PNC76083A / same piece I think you're referring to)... Body shop told me that they can easily fix it like new by bonding the plastic (don't ask me about the procedure) and repainting that part. For now since it's pretty cold outside, the body shop just tacked where the split started in order to prevent it from spreading and I'll take care of it this summer.
Since I've only had the car for 6 months I was maybe thinking of simply replacing the entire front end with a new one (comes unpainted) and getting it repainted... Total of about $800. I'd still get my current one fixed like new and just keep it as a spare.
Body shop also told me I was lucky I didn't crack front spoilers (Again, I think these are what you're referring to) on each side because although the entire front end is only $205 those small pieces are actually about $500 a piece!!!!!!!!! He told me that a new front end for the S is about $180.. Which I found odd since I thought the XRS and the S had the same front...