It sounds like there are some big tilapia farms in Missouri. Not sure where you are but look at tilapia as a great way to grow big bass and not to worry about tipping the balance too far in any one direction do the self-controlling nature of Tilapia.

Otherwise reach out to Rainman on this forum who can help you with all you need to know about tilapia and can even drop some off for you.

And for those in Iowa and in other states, where historically dealing with regulations relating to tilapia is confusing and frustrating, an online business called lakeway tilapia will ship tilapia to you. They just make it clear that it is up to you to make sure they stay in your pond. I find that a refreshingly simple concept and a common sense business model.