I do alot of work with Pitso kits - most of the Tetrix metal parts are on
www.3dcontentcentral.com.
I know someone is looking for the motor supplied, but you have to tell me the actual manufacturer and part number of the motor.
All you have to do is log in - it is free, but seach for "Tetrix" or FTC to find your parts.
Let me know what you need. Marie