Hard parts arent exactly cheap. A rebuild kid is $160 from d&d and all that includes is bearings, synchros, blocker rings and few other small things. That should be all you need, but actual gears arent cheap. Only way you are gonna find what you need is to pull it and let someone look at it. You can always buy user/junkyard one for $500 and have that last you for a while till you come up with something, My tranny guy charges me $150 for the labor for anything I wanna do to mine
--Mars