Were do you buy parts for IHI mini excavator track drive?

IHI mini excavators are great machines, but the downfall of some is the crappy Nachi track drives they use. These motors and planetarys are "OEM only" - in other Words, they are only supplied to the machine manufacturer and therefore are are very expensive to repair or replace. I suggets you do what I am now in the process of doing - changing both motors with brand new motors of another reputable brand, cheaper than I can get the parts to rebuild one Nachi unit! Good luck!