Here, I have two pictures of a trailer I made for Scourge from a Matchbox size truck. Looks nice, huh? and it even:
TRANSFORMS (Well, sort of anyway.)
(Trailer without Scourge) I didn't add a decepticon symbol on it so it could be used for either Scourge or Laser Optimus. Here's Scourge shown with it to give it some scale. I did the little laser drone to give it a feel like Optimus Prime's original trailer.