Rich, I know K-line made some nice 0-4-0 and I believe an 0-6-0 steam switcher along with the Plymouth which is a sharp little switcher and didn't know if you had any of those. They also made a steam Porter switcher but I think it looks too big. I know Weaver and Williams also made switchers but I believe those are all diesel. Since you prefer steam that explains the Lionel and MTH bent of your posts.
Joe A., the angle of your original picture gave #326 a more modern look than a "70s era MP15AC. It almost looked like one of those genset switchers and with a nice shiny paint job it looks brand new so I thought it may be a new switcher design. In Rich's picture it clearly looks more like the 70s vintage loco it is.