Plenty of international platforms to buy from. most of them accepts credit cards and wire transfers.
If you are specifically interested in ripple, you can check the platforms listed on ripple's official website: https://ripple.com/xrp/buy-xrp/
If you are into exploring other cryptocurrencies, check https://bittrex.com
PS: you will need to verify your account in most of (if not all) the platforms. you will need passport copies and other documents to verify.