I have just repaired this EXACT fault (same microwave). Ordered part from http://www.espares.co.uk/product/es1541121/microwave-turntable-motor?ApplianceTypeId=1095&ManufacturerId=435
Easy to install and cheapest around.
Old motor can be removed by snipping the access panel from the bottom of microwave, replaced by spinning 180 degs and securing with single screw (i used one of the many holding the main existing side panel on).
Stephen
December 2014