Ok, I'm sure there are several ways to do it, this is how umm...
a friend of mine did
Don't know if it's allowed to post a 1,2,3 guide so to speak but let's just say that Amazon does not require a US credit card to purchase a Kindle, you only need an US postal adress and an account with funds on it. US adress can be bought online through a mail forwarding services. Funds can be arranged with Amazon giftcards.
For specifics you can PM me for my email adress.