Moosic, PA 18507, is offering a custom-run MTH O gauge 4-bay Hopper as part of the RailKing line. The cars feature O-27 operation and are available singly or in sets of three (30-75758 shown).

I have the MTH No. 20-2595-1 Premier Line Harley-Davidson SD60M freight set from around 2005. I ran it a few times before the circuit board fried. At the time, it was already out of warranty.