You need to have found a viable business model, AND convince someone to partner with you, instead of cloning you - though it sounds reasonable that they would if you already have the infrastructure set up.
That said, it is an interesting idea, I know of at least one startup founder that's trying to do just that.
Finding a co-founder is indeed challenging and I can see how an offshore co-founder must seem like an insurmountable challenge but I believe it's possible. There are countless of bright and driven people who are hungry for a cause, more meaning in their life or just being part of something grand. You can find and recruit these people but you should primarily focus on great ideas and passion and not equity, money, etc. Also, tech entrepreneurs are so savvy and global these days that you can expect to find them on all kinds of communities such as HN and use filter them out based on documented past experiences (e.g. Github, Stack Overflow), recommendations (LinkedIn) or their online presence (blogs, twitter). Challenging but not impossible and destined to become easier as our community, business and recruting online tools improve.
Ultimately it is a question of persuasion, to rally up interest and support for your cause and we've been doing this as long as we've been walking upright.
That said, it is an interesting idea, I know of at least one startup founder that's trying to do just that.