Sure, I suppose that's possible, but it looks more like speculation than actual resolution.
The thing that causes me doubt about that theory is that if it was the "official case" sold by Peavey between two other case models, why wouldn't they have done something to brand it...just get two rivets and a Peavey logo? They did it with everything else.
The only "evidence" I have is that I've seen the same case used with the T40 many many times (I bought a T40 when they were first released and have been a big fan ever since). It would be odd that that many people bought the same, slightly weird, aftermarket case.