At one time there was a "kit" for the unit in the first picture--with the two model AC Mack hoods--but it was in 1 1/2" scale to run on 7 1/2" gage track.
The green and red one was given to Railways to Yesterday, a Pennsylvania trolley museum by Mack. It was, by the time of the RTY acquisition stripped of everything but the body shell. The picture shown here was probably taken in the yard of McHugh Brothers, in Penndel PA, a heavy equipment mover who did a lot of trolley moving for RTY gratis. That company is no longer in business.
One of the McHugh brothers sons Jim McHugh Jr (AKA "JC")
started his own company, repairing and leasing railroad equipment. For many years I was a member of RTY, and only heard mention of the Mack body on the rarest of occasions. I presume that it was scrapped, or otherwise disposed of, when the McHugh operations moved.
Incidentally, JC's company did quite a bit of work for the East Broad Top railroad, the site of RTY's operation, some of it gratis also. The then general manager of the EBT showed his appreciation with a tirade, a totally uncalled for action. Not the first time that happened-
____________________ Fix it again, Mr Gates--it still works!"
Top left - HLW, Hartland Locomotive Works, in La Porte, Indiana, has had for decades a G scale RTR model of it.
And the power brick is built like, well, a brick; pretty near to watertight and it will last through several doomsdays.
Bottom center and right - HO scale plastic body kit is available from Jordan Highway Miniatures. Directions show how to power with Bachmann HO "Gandy Dancer".
____________________ See y'all later, Forrest. Screw the rivets, I'm building for atmosphere