As far as finding a college program now is not the time for recruiting anyway. Colleges are in season and they are plenty busy there. I would start emailing hard as soon as their seasons end. Let them know where you're going to be, when you're going to be there, how hard he throws, his size, GPA, and who he plays for. Would also be beneficial to have his travel coach start making calls towards the end up the season on his behalf. That way when they show up to AC tryouts they will have your son's name on a list of kids to lookout for if they are interested in his size/velo.
For now you have to sit down with travel coach and get an honest opinion of which level they see him fitting in. If it's mid major D1s May/June will be the time to push hard. Lower level D1s the same, but you have more time extending into the late summer/early fall. If it's a top travel program they should have no problem picking up a phone.