Honestly, having just had to stat up 20 or more vehicles, planes, tanks, etc. for Band of Zombies, I'm here to tell you that it's not difficult to model Mechs. Use the vehicle rules in the AFMBE core book for your base stats, then add effects from the ATZ starship and robot rules, then tweak to taste. A bit of work for the ZM, but not hard, and doesn't take long to do, either.

I'd love to see someone tackle a Mech/anime sourcebook some day, but I know my limits and I'm not that guy. ATZ couldn't have done mechs and power armor the justice they deserve.

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Jason Vey
The Grey Elf
http://www.grey-elf.com/
What are you waiting for?? Go Buy Dungeons and Zombies!!!
And don't forget All Tomorrow's Zombies, while you're at it!

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If everyone knows the supernatural is real, than any psycho with a grudge can summon up Azathoth and destroy Oklahoma.--Nyarlathotep, BtVS RPG posting forum