Just finished rebuilding mine and installing it this last weekend. I didn't have to replace any syncros which are around 40 to 50 bucks apiece and there are 6 I think. The bearing set was 124. 00. The castrol syntorque was 14 dollars a quart for 5 quarts, 28 bucks for the new nut and 3 quarts of ATF for the transfer case. I didn't have to replace any hard parts. So if I hadn't replaced the clutch with southbends Con OFE, it would have only cost 222. 00.
Sounds like you need at least 2 lock up rings and the tabs and springs plus probably the gears to boot. If you are not doing the work yourself it might be cheaper to exchange.
Hope this helps.
WD