Workshop in Quito
A company called Racing Parts
Av. Amazonas 7378 y 10 de Agosto (Sector El Labrador)
Ph.: (593 2) 2408 690
It's a Kawasaki dealer, but they sell and work on all other bikes, even brand new V-Stroms were for sale there. Their workshop is very modern.
Also they are your best chance to find more hard-to-find tyres in Ecuador (i.e. for GS/Varadero/V-Strom sizes). I also called Moto Access (another Ecuadorian workshop recommended in HUBB) that didn't have anything and they recommended Racing Parts or BMW Quito (last one didn't have any tires in stock the time we checked tho).
S 00deg 09.400min