i would say that the gearbox you have is the same as mine. its an LT95, 4 speed, some had an overdrive aswell.
if it is the LT95, the transfer box and gearbox are all in the same housing. so if you transfer box is up the creak, then its the whole box out iam affraid.
ive just bought a second one coz my transfer box is broke.
ebay is best bet, my first cost me £110, but my second cost £50, but there getting a bit rare now.