and depending on how much your narrowing your rear you can do it yourself by shorteing the tubes and getting 2 short side axles out of a 2wd rear found out about that one after i bought my wheels
I have had 2 sets of blazer axles and a set of s10 axles resplined at Moser Engineering. One set was 4.5 inches i dont know about 6 inches.Thats only for ford 8.8 rearends. Theres no long or short side on s10 rears.. both axles are the same length and interchangeable side to side.
And also ya cant shorten and respline a 2wd s10 axle due to the shape of the end, ya cut thru the hardened outer layer before its the right o.d. to spline. I had my axle shortened 6" and had to get custom axles made to thr price of 300 bucks.