Joe, I work at a shop in AZ and have sent several motors to Brose for repairs. I will check to see if we can buy a belt or if we would need to send the motor to them to get the belt installed.
TOM
Specialized doesn't make the motor either, Brose makes the motor but Specialized will warranty it? and not the brakes.....Sorry to say and sad to report but your first mistake was buying a bike from Specialized with a Brose motor and your second mistake was buying a bike with Sram brakes!!