Sorry it was late and I didn't notice that you where talking about 2 different motors. The HV series and the 550 ballistics are the same motors just the ballistic is the new version, thats why I didn't notice that you where referring to two sepperate motors
Purchasing a stator for the Ballistic 550 is the least expensive option; we do have two RMF versions (w/new factory warranty) of the HV 550 in our store: