Just got all this stuff in the mail, the trucking company stuff is made by Mohawk Designs, the same outfit that makes a lot of those other ET&WNC related t-shirts.
The builders plate is a plastic casting, scored off eBay. It weighs next to nothing, and it won't take much touch up to make a really good looking wall hanging out of that thing.
It is a very good copy of the number plate that was on ET&WNC number 9, which that plate actually still exists. A collector yanked it off of the locomotive as it got scrapped, and it's in a collection today.