Canadian Members - Where do you order your factory replacement parts?

Im currently looking for an AC delco/delphi opti for my 97 camaro, as well as two new front O2 sensors. For some reason everyone and their dog around here wants 700$ for an opti, and thats just ridiculous.
Where are you guys ordering your replacement parts from, and how much are you being killed on the shipping?

Where you located and how bad are you needing one? Ill have a like new delco opti and msd cap n rotor kit come spring off my car when i do my EFI 24x swap come early may when i bring it out of storage.

Have you tried Rock Auto? Even with shipping, the pricing on O2 sensors is much better than I can get locally. Not sure about the opti though.

rock auto is good

I found an opti locally, now im just looking for O2 sensors. The front ones, pre cat, do you think the Delphi ES20317 Oxygen Sensor will work?

Got my o2s from rockauto was about under a hundred shipped to my door.