"Low buck" and "offroad racing"
You're going to need more then Google to help you on that search.
The safety requirements alone cost more then most built XJ's
Have you looked into SCORR or KORR B.C ? Not cheap, but racing...
Also, tough truck, I know there is at least 3 events most years (around Calgary). They're always a good time if you're low buck kinda guy, safety rules are pretty tame. Not long distance, but still fun.
Offroad expo is another competition, but not long distance... Still pretty fun!
Cross over into the states and your options open right up! as does your wallet