So is this another one of those "I have an idea but have none of the abilities to make it happen" threads? There's a reason none of those mods ever get made. Like somebody said before, at the very least you should learn some basic modeling. Most of the units can probably use the basic Magitech human model, so if you can make new weapons, tools, and accessories, and then re-texture, it will probably be good enough. Then of course you'd need to animate.
Basically, if you want this mod to get made, don't expect everyone else to do the work for you.
(PS: This thread needs a cleanup... BADLY!)