water in front headlights

[Alycone]

Since I was in a head-on collision I have a problem with water in my front lights, on one side it's so bad that the beam is barely visible, the other has mild condensation. My mech says the seal is busted and recommends replacing the front lights at a cost of $900 (about 350 for each light, plus labor). Granted, it's not my money (I didn't cause the accident) but 900 seems a little steep. Is it possible to reseal these things? Would the clear headlight kit from small car be a replacement option?