It's too big for Classics Prime and too small for Leader Movie Prime, but it might be a good fit for Voyager Movie Prime. I don't have one but I recall seeing him in stores, and I believe he would be about the right size. You can find these trailers at Kmart. They are made by "Just Kidz", which is the company that makes all those really cheap generic toys that Kmart sells. The trailer was $5. The only ones I saw were either blue like the one pictured or red. Judging by the inside of the trailer, I think the plastic is gray, so you should be able to make it look G1 by just removing the paint.