Hey, UPRR, if you are feeling "industrious", you could try this: Find a unit with a B/O fridge. Take out your Leatherman, from your grip. Cut-off the plug, with about 8" of cord, still attached. Go to Loews, or Home Depot, and get a rubberized extension cord receptacle. Install the recetacle on the opposite end of the plug. Viola, instant adapter, for fridge to standard outlet. Here's a hint. Get a second rubberized receptacle, same as the fridge plug. Make a "3-way" connector, with a fridge plug on one leg, a fridge receptacle on the second, and the standard receptacle on the third. You can unplug the fridge, install your plug, plug the fridge back in, as well as having the extra, 74 volt standard receptacle. Seen them around lot's of places........... 
"when in doubt, rip-it out".......... 
"when in doubt, rip-it out".......... Traveling Engineer, Coast to Coast, Border to Border.
Any Train, Anytime, Anywhere.....
Any Train, Anytime, Anywhere.....
