how much are you willing to spend? are there any 6 speed setups out there (i know of a few for scoobies) HKS has some gearsets. possibly something there.
if your looking to stop sinking money, selling it now would certainly get you some good cash, and you could put that down along with a small loan, and be driving something a lot newer/nicer.
good luck, but coming from an auto part's background, when the tranny goes, everything else tends to follow suit, and bring your wallet along with it.
dR