I thought it would be more, but researchers in Praha (Prague) indicate that official documents from the Government in Exile in the UK officially issued for just the pilots, 82 and 19 pilot insignia on two different occasions for a total of 101. So the total is actually very rare! And there were no other officially made from other makers listed in the Czech research sites. So that's it for the issued ones. There are many more cast bronze ones that were made in the field which are crude and hollow. But these are the official RAF/Czechoslovak ones. 

