Am I nuts? 1940 Plymouth Commercial Car (Truck)

very nice
any idea what the rear bumper is from?
I plan on adding one onto my 46 dodge, just need to find one I like that fits decent, and it looks like yours came from the factory

This is from a 48-52 Ford F-1 and I got it from LMC Truck parts.
http://www.lmctruck.com/icatalog/fa/full.aspx?Page=39
Pretty decent price. There is a guy doing repro dodge bumpers for the 40's, but he wants around $600 and the LMC one is $140.