Theres really not much in the kit beside a few gaskets, needle, seat and a new mixture screw and spring. I got mine through Jim Carters or the like, at about $40, and I wouldnt again. Much simpler to take the time and make my own gaskets at about $4, then spend the money on the kit.
I can probably dig up the rebuild instructions if your interested. Aint much to these old updrafts!
Jeff