I have done this hex conversion on my SC10/B4 using the parts from the SC10RS (7497 same hex pack for above conversion)
Northy in the pack you get 4 hex's, 2 x slim and 2 x thicker ones on the rear, you get pins and shims too in this pack, Im yet to convert my B44 but I am sure this is all you'll need, but let Wez confirm this, he is the man!
As for wheels, AE do 2wd hex rims as well as JC, not sure on 4wd, will Kyosho ones fit??...... I'll wait for the proper AE ones myself