It's not likely you'll be able to find any new gears. The best you can hope for is a salvage yard, craigslist, or maybe someone on this site has one.
Another option is swapping to a newer axle. I saw in another post you were thinking of swapping a K20 drivetrain it. If you have a Full Float 14 bolt, you could swap it in and use your original hubs. Of, course, you'll have to address the brakes though.
Chris
Last edited by Whitedog; 12/07/2013 5:55 AM.