Two places which have been previously mentioned on the LA board as having offered this dish as a special are Kate Mantilini's (Beverly Hills and Woodland Hills) and Billy's Deli in Glendale. The other place I can imagine as offering it at times would be Clifton's Cafeteria in downtown LA.
I've never seen it on a menu, but would also like to know if it's served somewhere in the valley. Don't shoot me, but have you tried Stouffer's? It's not bad.