Good luck on your efforts. I completed RTMC during my electives period of CGSC in-resident in 2018; currently a Citizen-Soldier (part time) for HHC, 54th SFAB and a Chicago Police Officer (full time).
Have you attempted reaching out to UFMCS? I'd be surprised if they don't keep a list of graduates.
Also, shouldn't some HRC wiz be able to provide a list of ASI 7J/ 7G Soldiers?