basic comp parts in Calgary?

[Ralph Pichie]

Where do I find non-ripoff computer components in Calgary? I've wasted
absurd amounts of time looking for a simple AC power cord for a
desktop.
$$$, deer-in-headlight looks or silly suggestions of Ebay are all I
get. I want this puppy up and running without waiting another week
until I can get to Edmonton to get the items out of storage.

No, Walmart does not have such.

Any suggestions? Chinatown? Small shop somewhere? Lost graveyard of PCs?