Req: Gunk or Duralube Fuel Injector Cleaner

[supsx]

I have been looking for these fuel injector cleaners at stores but they don't seem to have them in stock. I am not sure what the prices would be but from internet searches I think Gunk Fuel Injector Cleaner would be the cheaper one but I want to buy from a local store, so I am not sure what I could get for cheap. Does anyone know if some Canadian Tire carry any of these because the one I went to didn't have it, nor did the auto parts store I visited.

[supsx]

Just a bump if someone knows.