I bought some 4.56's from DC Peters a while back for that exact combo. Haven't installed them yet though. I think I got Precision. Haven't looked in a while; waiting till it gets warm out.
Thats excatly where i'm at too. Were to get the 4.56's and a rear locker. Randy's quoted me $467 for the gears and $147 for the true trac locker. Thats with all the kits and a thingy (tech term) for the 30 up front.
Thanks guys, I was in a hurry heading for work so I didn't have time to search. I checked Randy's R&P and didn't see any gears for the Corp. axle. His prices seem great but I want to get both gears from the same place.
This guy has package deals (gears and installs) on ebay for $190. I haven't dealt with him myself, so i can't vouch for his service, but that's a hell of a price...