I'm not sure if it would go through, but you could ask for a different shipping method. I recently ordered 6 sheets of stickers, and 2 sets of stabilizers. The shipping turned out to be $30 USD, but a day later I was contacted, and was offered another option for shipping which was at a significantly lower cost. I took the offer, and I was refunded my cash within a couple of days. Reason being that they usually ship keyboards - relatively big packages, and my small order did not justify the big cost.
I may have been an exception, but maybe it would be something for winkeyless.kr to look into? Great customer service, highly recommended! They probably don't mind a little talk back and forth about solutions.
Stickers are scarce these days, unfortunately.