TCC has a few mechs in his Flickr stream that could be useful for MFZ play.
The first two are part of a series using Lime Green as an accent color.
Not the one MFZ fans know.
This is the one I find most interesting. With a few tweaks I think it could be a really neat frame.
Goodness Knows What Fruit Is This Color.
I think I like this one more than the one before it. Great use of color.