His civil rights are being violated given he is not being accommodated. In addition, IDEA is being violated given the IEP isn't being followed. You might want to file a state complaint if going up the chain of command hasn't helped. In college, they take these things seriously. Schools lose funding when they don't accommodate at the college level so there is no need to 'prepare for a world w/o accommodations'.
There is scan to text software. Once it's text, there is text to talk software. If he is going to be using this at school, it should be written into the IEP so it's not viewed as cheating. Do verify that the IEP doesn't say 'when student requests'. It shouldn't. He needs this for every lecture & assignment.
In college, they pay a classmate for their notes so this is an accommodation for the future too. (My daughter's friend got paid for making a copy of his notes and providing them to the disability office to forward to a classmate.)