There are some recruiting firms that specialize in executive recruiting. That may be an option for you and is worth exploring. Another option is to reach out to some of the tech recruiting firms and let them know that you're looking for an exec position (director/VP/CPO/whatever) and to reach out if they see one. I've occasionally seen those pitched. You may also want to look at consulting firms, as those can turn into executive positions if the hiring company wants to keep you.