Maybe it's my engineering/fabricating background talking, but is anybody talking about those sus hunks of metal? It's highly unlikely newegg or any carrier has chunks of stock like that laying around for a switcharoo. I can only fathom that those came from a machine shop.
Also would hope these are aluminum pieces (not going to scale the photo to calc steel/aluminum) so we don't also have to talk about the complete lack of rust on the plates.
I mentioned this in the other post. Seems exactly like something a machinist would have laying around. Would certainly narrow down the suspect list.