kwhit, I have a 47e art deco with an original grain bed still on it, but it is in the shop at the moment...I should be able to get you a measurement of mine in a day or two.
The mirror arms are not available to my knowledge, but I have seen a couple on ebay before, so just watch..or..ther is a wrecking yard in Mojave CA that lists things on ebay under the name 'california-desert-treasures'. They have big trucks of that era, and offer to list things if you request them. That might be an option. They are a little high priced IMO, but probably have them.
I think crenwelge is right about the clearence lights, but are you both talking about the same clearence lights? Maybe those are referred to as 'running lights'? My truck is a COE, with a WIDE grain box from Kansas originally, and there are 'clearence' lights on the bed (which I'm sure are required), but none on the cab top. I have seen far too many trucks of our era that do not have the lights on top of the cab to worry too much about that being strictly enforced if in fact they were required. Maybe it varied by state?
