Uniseal bulkheads in Edmonton?

[Lonster]

Hey everyone, I am looking at setting up some brute containers as an ro/di resevoir and I am wondering where i can find a few uniseal bulkheads in Edmonton. I found them online but i dont want to pay shipping for something so small if I don't have to. Has anyone seen them anywhere in the city? Or have any better ideas for getting a bulkhead to seal on the round containers.

Thanks.