The engines can be found easily enough in aus from the mower, I have a couple of mates that have one each,
Every NSU RO80 I have seen has been fitted with a mazda rotary at some stage of their lives thanks to reliability, interesting car, inboard front disc brakes, an a rather odd clutch/gearbox arrangement.
I had an rx7 at one point, it was all fun and games until it let go of its apex seals in a rather spectacular fashion
