Depending on the damage, you may be able to get your broken case half welded up for cheaper than the price of a replacement case half.

a peace behind the swing arm hole **** and it put a hole into the inside of the case also pretty much F'ed it bad like a 2 inch peace is snaped and a finger size hole into the inside of the case so i found a few for 100$ or so .. not too bad should need about 350 to fishes the project up