I saw that I can get them but the price is in pounds. I've never actually bought anything ever from another country..
Ah, ok. You use your credit card the same way, and select Worldwide shipping. Your credit card will convert the currencies and charge you in US dollars, probably plus a small foreign transaction fee. (If you have Discover card, use that because they don't charge a fee). Otherwise you just enter in your billing and shipping info the same way as any other website.
Yay for inter-continental commerce!