I use a local racer to set up my gears in my Jeeps, but for the 9" in my CJ8 I just ordered a third member from Randy's Ring and Pinion in CA. I was the lowest cost( about $800 to my door with Detroit Locker) I found, and RR&P is a very reputable shop. He will UPS you a third member in the case of your choice, complete with gears, locker, ect. An excellent source for axles is Moser Engineering in IN. They cut and resplined my axles, and also sell axles. If you don't mind driving to Conyers, I'll find the phone # for Miss Misery Racing and post it for you. The last R&P they set up for me was only $200 for labor with my parts. He has done 3 for me including the rear in my 2000 F350.
Randy's ring and Pinion:
www.ring-pinion.com
Moser:
www.moserengineering.com