Hi Terry,
The link for the antenna x antenna is http://www.amazon.ca/gp/product/B00IKQZTPM?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00. It is the Canadian amazon site but i imagine they have on the amazon.com site as well. The antennaX antenna was shipped to me from Lake Mary Florida.
I tried with the AntennaX antenna today and it is comparable to the Canadian tire one. The Canadian tire model seems to look better with the truck as it is black, instead of the silver that the antenna x one is.
I would try asking antennax to see if they have one in black if you like. My truck is the metallic silver, so i think the black looks nicer.
The Canadian Tire one i bought off the shelf. Was around $20 or so. Be aware that the Cdn tire one does not have the 7mm adapter though. That's why i bought the one from Antenna X. It looks like the link is http://www.canadiantire.ca/en/pdp/e2-steel-replacement-mast-antenna-0350097p.html#.VRb4bLpOk5Q. I imagine you could get from NAPA or something like that down there.
Both the Canadian Tire and the Antenna X are a great improvement over the factory GM one. You would assume all three are made out of steel so there should be no difference, but obviously not. They all appear to be roughly the same length as well.
I live in Toronto which is right by the lake. I am picking up both Toronto (local) and Buffalo (across the lake) stations no problem now. As I mentioned before, this is the first vehicle i have had trouble with FM. Lucky for me that changing the antenna was all I had to do. Let me know if it works for you.
Cheers,
Jeremy