a neighbor got one off ebay once. ONCE
the welds were weak and when he landed on a rock he later noticed that the bumper broke at the welds. Dont mean to scare you but there are bad ones out there.
it was the cheapest bumper on ebay and didn't come with a warranty or return policy. find a seller with good reviews and you should be fine.
You can also find on DIY kits where they send you cut pieces of metal and you weld em together. Thats what I would do.
96 XJ, geared, 8.8, 5", 33s, dash