I recommend
Volantservers.com for your premium domain purchase, the accept bitcoin and other crypto currencies. You will experience easy usage and fast service.
Really shit mate, you have bumped the 4 years old thread now. I am not sure you think this helpful information to op. He may live or died who knows but digged the thread which is already dead mate. Please don't do these kind of things while you are making posts mate.
Then to purchase a domain you need to get the slip for the amount you paid I think fiat will be best option to do that until Godaddy or other domain purchasing site.