Phil posted some new catalogue items that aren't on his website the other week, see the link below and it's attachements. Prices for various viper stripe designs on there, and I'm sure his fitting would be a lot cheaper than MINI. Oh, and official MINI decals are not the best quality either, loads of posts on here about them.
http://www.mini2.com/forum/3120351-post1.html
Good luck.