To answer Otto's question, Ontario Lines, through the related company RSA Leasing, acquired 3 wedge plows and one flanger from the MILW. Two plows were assigned to OMID, and one plow and the flanger were sent to Ontario Eastern at Ogdensburg. All 4 pieces of equipment were converted steam loco tenders as noted above.
When ONER shut down, the plow and flanger from there were sent to ONCT. The plow remains there today. After OMID's Jordan Spreader had problems with a flanger blade mounted on the front, the flanger was sent from ONCT to OMID. It underwent a significant overhaul and painting, and the last I knew it was in excellent shape. I operated it on numerous occasions and it performed very well.
At some point about 10 years ago OMID decided it did not need two plows, at the same time LA&L was looking for one. So it was OMID who sold the plow to LA&L.
FWIW, at the time MILW had quite a few pieces of snow fighting equipment for sale. In addition to plows and flangers they also had - if I remember the name right - "cut wideners" which had wings on the side to push snow back in the cuts. Those too were former tenders. None of those was purchased locally.