Thanks everyone for the responses. You're great.

While out looking around for some wheels for mine, I found a COE, all done up as a junkyard wrecker. I snapped a quick pic of it. Unsure of the year though.

COE Sighting

I'm going for a sort of "mini semi" look for my 47 so maybe 19's or 20's will work. I don't know yet. Simple open back end, maybe a utility bed or something, small 5th wheel, who knows.