I agree with Cabbagedad and would look at it as a two-pronged approach: 1) play high level travel ball (if financially feasible) so that he can face strong competition, continue to develop, and work with coaches who may have good contacts with colleges; 2) attend on-campus prospect camps individually at the schools that he is most interested in attending.
Btw, registration is already available for the Junior Fall Classic Academic Game Try-outs: https://azfallclassic.com/junior-all-academic-game/. I highly recommend this event and, ideally, your son would find a team to play with in the tournament as well. Good luck!