Never heard of it being served anywhere else. Just a suggestion since he loves it so much...if he can't get a reservation next time he's there, tell him to check at the podium and see if they will do a to go order. Of course it won't be all you can eat but atleast he'll have some and there are quite a few spots in Fantasyland to sit outside and enjoy it. Even if they say no, it doesn't hurt to ask!