Arkt1k:
SDP-SI is where I got mine. Sort them for M1, Acetal w/Brass insert, Hub w/SS, 8mm bore size.
BL_RV0: Are you gonna run foams? The stock tires will balloon a little bit. I noticed it was set to 0 in the calc. The GTP kits are very nice. BrianG, B4Maz, and myself are also working on conversions. Good luck with yours!