85768 IP Blocker Script

Hi I have a new dating site which is getting bombarded with scammers from countries outside the USA. I need someone to create a script that will block foreign IP addresses (outside the U.S.) Is this possible? I do use programmers from India. So if it's possible to block all foreign IP's with the exception of India that would be great. The scammers are coming from UK, Nigeria, Pakistan, and Canada. So these are the most important to block.