Alan,

If it's designed around their K-member, I'd guess you'll have to use it. Moving the lower control arm pickups is going to have some pretty signifigant effects on geometry. It could take the arms out of parallel at ride height which will send your roll center and camber curve all to hell. If they mount further inboard or outboard (even slightly) you'd need to have custom length control arms made up to get the camber back within adjustable levels, but changing those arm lengths is going to screw with bump steer and roll center height.

Keep an eye on corner carvers. Once it's out in the hands of normal mortals, somebody will get some measurements and put it in suspension analyzer and then you'll be able to get an idea of what's going on.

Apparently MM has an SLA prototype as well, so holding out might be the best thing.

Mars,

I know Bartworks makes one. I think there's one other, but I can't recall who right now. I'll post it up when I think of it.