And while we're correcting, they're not quite as rare as what your original post would indicate, though rare none the less. Best estimates for the larger sized sets that fit 85-100 horse engines is 3-400 originals. Now, if the set you refer to is for a V8 60 horse configuration then those are much more rare, probably 10-15 sets ever made, and those are not repoped, though the basic engine tooling was sold to Simca who ended up making a very similar "clone" of the Arduns.