Bmutha
Super Freak
You're right, it's Fedex. But it's still the same problem... customs charge...
Sign yourself up for a FedEx account and give the account number to Sideshow.
This allows FedEx to charge the GST directly to the credit card that you link to your FedEx account. In doing so, they will waive the $10 brokerage fee they normally charge, and you don't have to worry about paying on delivery (because they just automatically charge your card).
This is what I have done, and I only get charged GST with my sideshow deliveries. The only crappy part is they convert the USD value to Canadian dollars, and then charge the GST on that amount.
The only other fee you have to pay is the currency conversion that your bank/credit card company charges, usually about 2.5%.
Keep this in mind if you order direct from SS in the future.