As mentioned, the prices will vary but, I might recommend that you just gusset up your C's and not sleeve it. I would instead use the money you save to help pay for a set of new chromoly shafts with full circle clips. Of course, if you plan on installing something like an ARB, you'll need to get a set of 35 spline shafts (a very good thing) and you won't be able to install sleeves.