Does anyone have recommendations for a good machine shop (GTA) to have a flywheel resurfaced?

Specifically, this is a flywheel for a 3.2 Carrera and so I am looking for a shop that uses a "diamond" grinding stone, which I understand is the only stone capable of retaining the inside edge at the outer edges of the friction surface.

Basically I want to find a good quality shop that understands these cars...