I ordered a replacement lamp for my DLP television from dynamiclamps.com. I got what I ordered reasonably fast in perfect condition, so I think they'd be a good source for your replacement. I just poked someone via their website chat and asked whether they ship to Canada. They do, but it's via USPS so it might take a couple of weeks to arrive. Here's
OEM bulb + housing for considerably less than you were quoted locally. (Change "Economy bulb" to "Original bulb".)
Edit: I just chatted with someone at BSA's projectorlamps.com link and asked the same question. She said yes, they ship to Canada. Just choose the $28.50 USPS shipping method on checkout.