Years ago I came across the disposal files for these, at LAC. However, I no longer have the reference number.
Most of these were sold to industries involved in the war effort and which could not acquire Caterpillars or other movers. If you find the file it may be worth scouring some of those companies in case the 6-tonner is still in the back corner of their yard. I do remember that Sorel Shipbuilders was one of the buyers.