I just saw a 14 bolt on the FS board for $150 w/ 4.10. I think I saw a set of 8 lug outers for your 44 also.
A 12 bolt is'nt worth the bother. I think your 10 b has the same 30 spline shafts. All you would gain is a little bigger ring gear.
IMO if you are'nt giong to do a real upgrade, yust rebuild what you have.