Hi Willie,
the third generation freewheels appeared already years ago; first version was made of plastic, second Aluminium and third again plastic ( 
).
Hi Chester,
these are maybe not available in my small country Austria - but anyway in Europe, for example the oddcyclist from Sweden has them.
Before giving the Aluminium ones away I’d wait for reliable durability reports about the third generation plastic version 
Cheers,
Chris