In answer to Dales question about Simplex freewheels and "Classic Bikes" (Not Bicycle Classics) Ray Ethertons old business, it is still operating and still has a small stock of Italian made Simplex freewheels. Close ratios only. It does have a good stock of sprockets for these freewheel bodies. The new owner lurks in the back ground of your list.
Regards
Martin Coopland