If your windshield is chipped/cracked, just claim it on your comprehensive insurance la. I think the deductible is starts at $300 (depending on your plan).
Otherwise, call the junk yards / auto wreckers to see if they any SLK230 in. Then again, the windshield is likely to be damaged (from the collision) and you'd have to remove the windshield yourself. Not exactly an easy task.
-Lik |