You might reach out to Vern who is building a Long Island route (which is excellent) which does have 3rd rail. The route is in the file library here...
There has been discussion about this. It isn't very far away and some folks have got it working, I think. The migration to mongame will make it even...
I remember when Conrail brought 20 or so of those single level container cars in the early eighties every night from the Massport Conley terminal out...