Using the keywords you provided, I was unable to search for anything solid. I did come across the below link, but could not positively identify the location of the organization.
http://nyaasports.com/9.html

Hope that helps,
Ken

I tried searching again going backwards from town to school and found Northridge HS in Dayton, OH. Contact the AD there and ask him if he can put you in touch with their cheer coach, who would likely have some info about the Expo:

Mark Bailey, AD
mbailey@northridgeschools.org
(937) 274-8545