Hey mate, good to see he wants to get into it again!!
Not an ultralight flyer myself so no experience of any of the schools, but if you haven't already, check out the RA Aus website at
Welcome to Recreational Aviation Australia where you'll find a list of all schools available.
I would have thought that given his experience he'll pick it up again in next to no time and will be sitting a checkride far sooner than most.
Good luck to him - I hope I'm still flying at 76!