How can I find the right business owners?

I am a sales success consultant, focused on inside sales teams. Performance improvement. Developing systems and processes. Maximizing inbound marketing campaigns. I have learned in the last 12 months the niche within in my niche, is to fill in an org chart gap between a CEO/ Founder and the sales team. Many small and medium businesses have a CEO at the top who is still dealing directly with the sales reps or sales manager. But that's a bad fit. There needs to be a layer in between. Someone who can take the CEO's vision, turn it into a strategy, action plan, and systems. And keep them out of the weeds on sales and drama. The challenge I am currently facing is finding those CEOs. The ones with holes in their org chart. Yes... networking can do it, but it's almost a needle in a stack of needles. Most of my clients have come from referrals or relationships. I would love any ideas of where I can find these types of leaders who need someone like me. Whether they realize they have a hole to fill, or they don't know how much better their business could run and how much more they would enjoy running their business (when they stop needing to directly manage a sales team).