http://www.mazda.com/
look at the bottom right corner. they have owned 51% for a couple years now. ever wonder why the probe looks like a rx7. or why the FD never made it past 95 while in japan it went to 02.
They didn't ban the motor, just the variable intake trumpets system that increased and decreased the intake runners lengths to maximize power. It is a very very expensive endeavor to do Le Mans which I think is mostly why Mazda didn't try and rebuild another car to race in it since a very important part of the 787B's engine wasn't allowed anymore.
http://mrccfl.com/787.html