Man I remember that store.
That was a long time ago. Although Hole in the Wall continued to exist I think well into the early 90's in a spot on Macleod Trail.
Anyhow, Jim, I know your pain as I've looked into this myself. There aren't a lot of cheap options. Hydroponics store is probably the only spot locally, Home Depot/Rona/etc isn't very likely to have anything that fits the bill.
What are you hoping to use it for? There might be a different way we can achieve the same endgoal.
There's also stuff like this (still not really cheap though):
http://oceanaquatics.com/store/produ...-Dosing-Pumps/
http://www.mops.ca/cgi-bin/SoftCart....e96+1215730585