RickT,
I ordered one set from a LHS, and the other was ordered by a friend of mine directly form Sig Manufacturing. Sig was the fastest to ship and both places had the same price.You can call Sig or go to their website at
www.sigmfg.com to order.
The 4*120 gear is pre-drilled for fuselage mounting, for axles and wheel pants. Fuse mounting is with 3@ 6/32" bolts and blind nuts, however I will be using 1/4x20 nylon bolts and blind nuts.
Hope that helps,
Loren