I was going to suggest the magical spell to summon a person on the internet -- say their name three times in a high pagerank location with your eyes closed, of course -- but it only works for people who haven't yet tired of googling themselves.

In this case, the guy has 50 titles to his credit, some of them quite big blockbusters, so I suspect he's not going to notice. Maybe he'll have a nephew or other connection who'll let him know his input is urgently needed on a matter of great importance.

Oddly enough I've got a 3rd level link to him (a set decorator sharing his name, what are the odds its not him?) on Linkedin, but apparently you can't send such a person an email without paying Linkedin for the privilege. Is it worth $20 (/month) to send Mr DeTitta a message he might not even read? I'm going to say no, sorry HN.

He may have just approved the item, but he might be a start to tracking it down.

The map should have been "cleared" (ie permission from the rights holder obtained), but if they thought it was a real hand drawn image created for the film, they may have missed it.

Side note, imdb lists three additional people in the art department with his surname. The power of having a long career and two oscar noms, I guess.