I'll check out the patent designs that have been approved to date and see if there is something like this. If not... you may want to consider filing a patent application...relatively dirt cheap as long as you keep a lawyer out of it (which is pretty straightforward to do). Otherwise I would fear that the M-company may file it just to keep others from putting it into their design (hopefully they don't read the forum!).
So many companies buy patents just to shelve the idea to prevent competition. Gross but a fact of business.
I think the one place that you do get your money's worth from Mattracks is in the ATV track. They leveraged alot of design from their full-size version obviously and they actually sell for a more reasonable sum. When you look at those and what the competitors offer for ATV's... they blow the competitor away for price/performance point of view. I saw a used set recently for $2,500 with only 1 season of light use. I'll buy a set of those down the road. Of course Mattracks hasn't attacked the ATV competitors because the money ain't so great... although I think there are far more Mattracks out there for ATV's %-wise than for trucks/suv's/etc.