You can get a ZC tranny from HMotors for $150. Not sure about shipping. But raid those gears. Buying new, if you could even get them, would certainly cost more. Order up an HF 5th gearset from Honda too. I forget the cost for this... $50? $80? Then order a tranny rebuild kit with new synchros, seals and bearings, and when it's all together you'll have a perfectly geared, brand new transmission.
Oh yeah, if you've ever planned on a limited-slip diff, now's the time to do that.