you can try ebay, but i'd also look at some PN mtors. i pefer the PN speedy 05 BB
heres a link to some of their motor:
http://www.kenonhobby.com/130-Motors...ies_c_162.html i used to speedy 05 in my MR-02 when i raced mini-z great motor. PN makes good stuff for less money then atomic