I recently won an auction for 2 of the older version 0-4-0 tank Porter engines. They are lettered with "Oak River Lumber Company" livery which I believe were originally offered in Big Hauler starter sets. They looked in very good condition on the outside but when I went home to test run them, no go. After taking them both apart, I discovered one was missing its motor along with stripped gears and the other has stripped gears as well. I could not find these models in the latest Bachman catalog or on this site, to say the least of gear replacements. Are these still repairable and are there parts available ? A prompt response would be appreciated.