Yeah, you can purchase yeast from this yeast bank but you're running into two problems. First, they're located in England. I don't know about you, but I stress if I'm getting my yeast delivered via mail, especially on such a long trip as that one. Second, they're expensive. You're looking at anywhere from 52-100 Euro for dried cultures and 82-120 Euro for liquid cultures.
It's a cool list of pretty much every yeast strain known to man, but is probably way out of our price range as homebrewers. If you find a yeast that you like from them, you could always make slants and keep a "master culture" but I say just stick with Wyeast or White Labs. They have popular, proven yeast and are American companys. Just my two cents.