I did 90% of my build through 4wd.com I've also used Off Road Warehouse out here in Cali, Gen Right I've called directly as they had better prices for their stuff than other on line sites. I go to the Pomona Expo out here in Cali where the vendors offer all of their stuff at a discount with free shipping if you buy it right then. As far as diff covers go, Solid is nice, but there are a lot of "hang up points" on them. I went with the Riddler covers. they just kind of slide over whatever is in front of you in most cases and they are made of 3/8" steel.