I would personally recommend Kal Tire. I've been dealing with the location on Steeles ave in Milton and their service has been nothing less than excellent.
They are fully versed in handling Teslas. They the Milton location has 3 sets of jack pads and their staff are all trained to deal with Teslas. I had my snows installed yesterday. I purchased a set of Aero rims from Oakville SC, Kal Tire supplied Hakka R3's and the TPMS sensors. When I swap back in the spring, cost will be $40 total including balancing.