Here are some possibilities....I have no inside information that Lerner has looked at or will look at them, but noone has information that he hasn't either, so my conjecture is just as good as your conjecture:
Director of College and Pro Scouting - Tom Ciskowski
He does do more than scouting for Jerry Jones and Jones has allowed him to convince him, so he obviously respects his opinion. for instance, he was the guy who convinced Jerry to stand pat and draft Felix Jones instead of trading up to get McFadden.
Then, there's the Pitt guys
Kevin Colbert, Director of Football Operations
Doug Whaley, Pro Personnel Coordinator
Not sure that we could squeeze Colbert out, but it'd be worth a try. For more on Whaley, here's a nice article that talks about him in reference to KCs GM opening:
http://www.arrowheadpride.com/2008/12/22/699394/getting-to-know-a-gm-dougThere's 3 guys that for all we know Lerner is trying to setup interviews with. Can they tork with Mangini? I don't know, but noone can say they cannot.