Simon, any idea what length they are ?
FWIW front load washing machines use a poly V (multi-rib) belt, but the pulley on the drum is flat, only the drive pulley on the motor is grooved.
When in Penrith drop around to Gasweld (used to be in Batt St, off Mulgoa Rd) with the machine make/model and even the belts you need.
They've sold wordworking machines forever, they might be able to help.

