We're a bit far from Dayton Ohio, but if you get to the Seattle area there will be two classes offered this summer which, together, will prepare you for level 1 certification.
Level 1 part two will be held August 6-11 at Holy Family parish in Kirkland, WA and led by formation leader Rebekah Rojcewicz. I've attended trainings by her in Kirkland and San Francisco and been very impressed. Level 1 part 1 will be held in Seattle this summer July 1-7 at St. Therese Seattle by a different formation leader.
You might also check out the national webiste for classes to find something closer to home:
P.S. because of the need for specific materials, and some sort of dedicated space (preferably a classroom/atrium but certainly a large storage space if you have to set up and take down a classroom weekly, you will need to have the parish on board. However, you could incorporate aspects of your CGS training into a standard program!