Ming wireless on Dundas West (at University) will unlock GSM phones. Many, many other places across Toronto, Markham, and Richmond Hill.
For your specific phone, you might try contacting these people. However, I've never used them, and am not vouching for them. Ming's a reasonably good place, but I don't think they'll be able to help with your phone.
And before you go through the trouble of calling those places, take a look here.
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