For the manifold & carb try VMXunlimited, can supply the spokes as well although crhighperformance are a lot cheaper for the buchannan sets.
I have a set of rims from torpedo7 on my CZ, rear involved redrilling & different nipples as the rim had 8mm holes, front needed minor redrilling, for the $150 delivered I thought they were worth trying but at some stage I may get a set from full circle racing in the states