Looking at my catalogue from common drives, such as T, AT, HTD and L, I saw you moved somewhat in the direction of the unobtainables. Google learned that GT is a proprieetary design of Gates ...sold through Gates approved dealers...., then Google "GT2 Gates Europe" gave this:
http://www.gates.com/Europe/brochure...cation_id=3628
They are in Spain. Hope this helps.