Google and LinkedIn are your friends. You can search by school on LinkedIn and you will find many people.
In addition, you can reach out to current students. the MIT website has email addresses for all the clubs and you can email any clubs that interest you. they'll also be able to connect you with alums.
These sound good approaches. Just not sure whether alumni will reply.
100% of alums you don't contact will not reply.
Even if you get a response rate of 50%, if you've contacted 10 alums that's 5 people to talk to. Just give it a shot, be polite and professional, give them time to respond etc.
Do let us know what kind of respond rate you get. Good luck!