4wheel parts in S.J. will have them as would any 4wheel store. Somebody else might suggest other stores if they exist around here. They are usually 2" or 3" wide by 30' long. Loops are sewn into both ends. You don't want hardware on the ends of the strap (read the 4x4 basics for why). You have a hook mounted to your frame on the front of your X, and if you have a tow hitch in the rear you are good to go. If you don't have a tow hitch and need to be extracted stern first then you need some attachment point in rear frame. Some people have used deep U shackles around the leaf spring hangers as one solution. A good strap is ~ $30.