I've searched both BikeForums and the internet, and I've been unable to find an online retailer that sells lockblocks in packs of three (marketed for U-locks). The only site I found doesn't ship to Canada.

I'm looking to buy a whole bunch of these and I don't want to have to buy them individually and pay a premium.

Does anyone know where I can find them?

You can get them at the following links (it used to be part of www.fenix-store.com). They do mention that they ship internationally.

BikeBlocks - https://www.4sevens.com/product_info.php?cPath=92&products_id=341 - $16.49/3pack
LockBlocks - https://www.4sevens.com/product_info.php?cPath=92&products_id=274 -$15.99/3pack

Great shop to deal with Fenix-Store. Thoroughly recommended.

http://www.jensonusa.com/search/?s=twofish&btnSearch.x=24&btnSearch.y=10

What is the shipping charge like from 4sevens? I didn't see a way to get a shipping estimate before giving payment info.

Free.