Prelim Mutant Future Rulebook Cover Discovered?

Hmmm...this is an interesting discovery. While Googling around for hidden Mutant Future gems, I came across a rulebook download at one of the many file-sharing sites. You can find the core rulebook (and earlier art-laden free versions) everyplace, but what caught my eye was the cover attached to the rulebook. I have grabbed it and posted it here for your review.

My first thought was that it was a custom fan-made cover. But there are a few details that a fan would not have used. First up -- the original Goblinoid Games logo appears at the bottom of the cover. An odd detail for a homebrew cover designer to add. But what got me curious was the title itself. The font used is very definately Metal Lord, which is the font used for the original cover's title as well as throughout the book. The font is rather obscure, and why would a fan go to the trouble of using the same font as the "official rules" rather than using something different? The artwork though appears to be from a Gamma world product, but I'll be darned if I can put my finger on it...

So my question is this: Is this the preliminary cover that appeared on the Mutant Future rules during the original playtesting? It would make sense if this were the "placeholder" cover used, as the artwork is obviously culled from another source, but indicative of the "feel" of the final rules. So if anyone can shed some light on this mystery, I'd be appreciative!