I would probably just pay the $500 and get it done... real tough to manage that stuff from across the country.
curious though, what part went bad all of a sudden? y-pipe? cats? O2 sensors? resonator? a full exhaust is well north of $500...
99 uzj100, gx470
05 525EXC, 01 XT225, 07 TTR90, 07 CRF50