nope, been around for a long time. never seen one or heard of one being sold.
but i can say this, it seems good in theory, but in reality, a horrid idea. each motor/coil is going to be slightly different, and even though it is slight, it is going to yield in a variance in performance of what is driving the cone. that results in non-linearity, and probably broken cones or detactched formers.
would be interested to see some specs on it though, they dont list any... however, in a head to head match, i would still put money on a traditional woofer in both SQ and SPL.