Where is the best place to buy parts?
Tower hobbies is the sole U.S. distributor of Kyosho (unfortunely).
They carry most of the parts and the rest are due in May. You can type in the part number in the search window on thier site. Tower can charge what ever they like because of this arrangement so you can only get a kit through them or a retailer who buys from them wholesale UNLESS... You order from Japan or Hong Kong. Champ RC in Akihabara, Tokyo, Japan has all the parts and good prices on kits. RC-mushroom in Hong Kong probably has the same. Earlier in this thread there are a lot of conversations about this subject.
Because of Tower's (Hobbico's) arrangement as sole distributor I never see Kyosho in any hobby stores.....maybe Kyosho Japan should wise up to this.