If you have a reference for that, please give it. I have read on here and elsewhere that it is no longer from Quaife.
It is defiantly no longer Quaife.
One of Morgan's investors owns an automotive transmission company with major global car companied as customers. His company are manufacturing a new bevel box with revised internal gears. The case mountings are the same as the Quaife box so it MAY be possible to retrofit the Super3 box to the M3W however I don't know if that has been confirmed.