Hey razeonex, Its generally recommended to have a co-founder from those whom you know already. Are you sure there is no one of your friend who can be the business cofounder? You can also try http://founderdating.com/

One more thing, contrary to popular belief, there are many successful solo entrepreneurs out there. If you think you can learn about business legislation in Mexico, starting up as a single founder is also an option. You can bring in others later.

Thanks