I would also be in for DHL to Canada, second choice would be FedEx (UPS gouges on their 'brokerage' fee).
While on the subject of shipping, I read above that you will be shipping the colors separate from the regular ( ) - but in that case would you ship say 2 sets of colors/regular together? Just trying to keep the shipping (hence over all) costs down here to Canada. That being said, do you have a rough idea of the cost?
Now a final question, I noticed on the web site that the type is broken down by brand, would I assume there is no difference between say a Williams DMD machine vs. as System 11 (that is to say the Williams ones should fit 'most' Williams machines)?