Well, if you're willing to pay extra, you can use a forwarding agent. They assign you a virtual address in the UK which you can have stores that won't ship internationally send to, and they forward it to you once it reaches their hands. Sorta like Noppin except that you're responsible for buying the stuff.
The one I used for the Argos 20" Pinkie Pie is
www.forward2me.com . Be warned tho, they're not exactly cheap. I have another cheaper one that I regularly use,
www.vpostasia.com, but they only serve certain countries in the Asia-Pacific region and not all web stores work with them.
Hope this helps, and good luck on getting a new hoodie!