Drive shaft replacement options

[Dannyboy1966]

I have a 1986 GMC 1500 Sierra Classic. A week ago was under my old girl, and realized I had a bunch of wobble in the carrier bearing. So this weekend since it was nice, bought a new one and decided to get after it. I HAVE A PROBLEM, the shaft that the carrier bearing presses onto has worn away about 1/16th of an inch. The bearing was still spinning, probably why I didn't feel a vibaration, or hear a squeeling sound. What year's and options do I have as far as replacing it? I'm running a 350 with a SM465, and 373 rear. The part of the shaft I need to replace is 41" long 32 spline slip joint. Can't find a replacement anywhere.