Reddit mentions of Heavy Gear Rulebook, 2nd Edition (Dream Pod 9)

Not too hard to find hard copies of the books on Amazon. I grabbed a used 2nd ed core a little while back. I really wanted to play this game when I was a kid in the 90's. I still want to try it, but none of my players are very interested. Mostly I just skim through and look at the rad 80's anime mechs like I did when I was a wee child.

That's fair enough. Work with what you've got!

However, For ideas I'd also dig into games like Heavy Gear (which has some anime influences) and Mechwarrior (which is the classic mech-based RPG) if you can manage it. Heavy Gear especially has a very simple, scalable system that you might like. The 2nd Edition is the best, though some enjoy the changes in 3rd Edition (these edition changes aren't like D&D changes, but rather little revisions to the rules). You can pick up a copy of Heavy Gear on Amazon for as little as $4. (http://www.amazon.com/Heavy-Gear-Rulebook-Edition-Dream/dp/1896776329)