Isn't the DME a 60' beer car? The WOT car is 50' The WOT car also has a 6'/8' door combination while the DME car has a 8'/8' door combo.
I would start with the Red Caboose PCF 62' beer car. It has the rib centers correct. I used one for a similar build. In this case, a 53' FGE beer car:
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This will be a rather complex chop job. the sides would be 4 parts. Two doors and two rib sections glued together. The Red Caboose ends may work, I would have to go and check.
This would be an interesting project and I have several PCF bodies left over from my FGE project. Does anyone have plans or drawings of these cars?
If I'm going to cast my FGE cars, I may as well do another body too.