Weber Rotisserie Motor - POOR QUALITY

In Dec15/Jan16 I purchased the Rotisserie Accessorie (Code WA ********** ). Since then the motor has NOT worked for mare than 30hrs, nor carried any weight in excess of 2kgs.

The motor is now defective. Poor, poor quality!

Where can I purchase the motor ONLY and NOT pay another R700-900 for the entire package, all of which, except for the motor, I do not need!