I have an 88 GMC Jimmy 1/2t and my fenderwells have some rust holes in them right behind the tires near the lower fender and need replacing. Where can I get them (online or catalog)? If GM , please give part numbers /forums/images/graemlins/crazy.gif How hard is the install? Do I have to remove the outer fender? I crawled under and looked and appeared to not be a too dificult job, but I would like yalls opinions. I thought about just cutting some sheet metal and patching the large hole, but I hate to halfstep and would rather replace them.