Check out www.chainreactioncycles.com
they are a Northern Irish based online bike shop. They also do snowboard stuff. I have bought a lot of bike stuff off them and if you order on monday you will have it before the weekend. They have free shipping on items over £100 in value, they offer CHF prices on their website, and they deduct the VAT automatically when you put your address in as Switzerland. I have had good experiences with them on the biking front, I can't see any reason why they would be different for snowboarding gear.
Also another tip for snowboarding gear if you are around Zurich at the moment. There is a shop in Wallisellen that gives a 20% discount on all this years (2008) snow sports stock for the first 2 weeks in October. Could be worth getting down there this week! The shops name is Sport Plausch Wider. If you google them you will find their website.
Hope we get lots of white fluffy stuff to go play in this winter.