I broke my jaw as a kid and had my teeth wired shut for a couple of weeks. Half-and-half was the best way I found to get calories. Mix it with chocolate syrup to change things up. Protein shakes are also good.
I suppose I'm shilling here, but check out rockauto.com for car parts. They carry an insane number of car parts for basically wholesale prices. A lot of times you can still buy the individual parts instead of entire assemblies.
Maybe there's a show at Ford's Theater he can attend instead?