Unfortunatly you won't to be able to pick up a 415 chain at a local hardware store. Order one at a local motorcycle dealership. They all have a bunch of aftermarket parts suppliers. But most likely the guy behind the counter has no clue, where to look. So you have to do the research yourself.
The biggest suppliers in Canada are
I ordered the a EK 415s chain from the importationsthibault catalog was $16. Or go for rhe racing stuff. That's about $60. Ouch!
I got all kinds of goodies by doing this, for example Michelin VM100 and Gazelles tires, mirrors, fuel filters, handle grips, light bulbs.
you save on the shipping and duty, and if they make a mistake ordering your parts, you don't have to accept. Saves you the damn return shipping hassle.