Yes there are many where u can buy Btc notably - bitstamp,cex.io,btcc etc.
But I'm not sure about AI,u can contact Elon Musk here -
https://twitter.com/elonmuskThanks
I am sorry, but I did not get the context of mentioning Elon Musk here.
Also, regarding Bitstamp, cex.io, btcc, have you purchased bitcoins there? How did you deposit money on those exchanges?