Network, network, network.
People who coach executives professionally, and CEOs are ALWAYS looking for ways to optimize leadership. There are two components here that make up your product: the program itself and the destination experience. One of these can scale, and the other is limited by environmental (there are days of the year where travel is not going to happen) and physical factors (you can only work so many days in a year).
This means you need to curate a pool of ambassadors to represent you as sales assets after the experience is applied plus 2 quarters in their home brands. Country Clubs, Industry events, and their D levels is where the C levels will be made aware of the benefits to them and their leadership.
There are two Mateoisms that apply here: "Your network IS your net worth" and "Do once, re-use many."
Here is how I would approach it:
Produce a simple yet engaging Legal / 216x356mm sized infographic that illustrates the impact of the activities on bottom lines, the value statements as KPIs, how much stagnancy slows production, etc.
On the reverse side place the one page brilliantly worded and wonderfully produced brochure for what you do, and why they need you.Proactive:
HR Conferences coming up - go to them, and start conversations with recruitment leaders
Network at social events in market segments where you can meet CEOs - HOST a MeetUp or start giving talks at ancillary events on the importance of retreats.
Using the same graphics leverage LinkedIN articles and publish the article on the infogrpahic in three parts: Part one - covers all areas of the graphic in high detail, part two covers the improvement in EQ, and part three the mechanics of the bottom line.
This is like putting premium bait on a line and dropping it into a reef full of fish with he RIGHT fish for the bait will be attracted to it.
This activity will give you legitimacy and clientele at the same time. Clientele are different than customers in that they will (if incentivized well) re-sell your brand and services as a result of their positive experience.
Sounds like you are on your way to much success!
Be well and stay awesome,