Our flying Club (Fort Wayne, IN) has an RV12, and we have a student getting their Sport Pilot license in the airplane. I'm looking for a DPE in this region. FYI the airplane is beautiful, immaculately built and maintained, and flown regularly. (80 hours last year)
Might try Denny Green at Muncie. Not sure if he does sport or not but I know plenty of people who have used him, self included
https://www.muncieaviation.com/contact