Fearsome, where do you live? There is not much to inverting a transaxle, however if you are going to purchase a used unit, it would be in your best interest to have it looked over and probably rebuilt.
We would be happy to help you with this if you would like. Let me know if I can be of any help to you.
Warmest Regards,
Erik Johnson
Carquip Sales
(303) 443-1343 ext 2