Lionel 42

I Went to a train show at the St. Louis museum of transportation before Christmas. The tables were set up in the historic vehicle building and it was kind of a neat place to hold a show.  So I am perusing the tables and lo and behold I see some standard gauge on the table in front of me. There in all of it's glory is a beautiful example of a Lionel 42 electric, but there is one problem, way to cheap. I asked what was wrong with it and was told "it doesn't run - no armature".  He then said 150 takes it home, a couple of phone calls to locate an armature and I said sold. So I take the engine to the guy that has the armature and he takes one look and said that's the thin rim loco and good luck finding parts for that. When I look inside the Windows I don't even see the motor. Is there a parts diagram or image of the power truck available ?  If all else fails she will sit on a siding and just look pretty.