This is a set of resin 1/32 Luftwaffe Pilot Heads from Ultracast.   These are from the WW2 time period...1939-1945.

Original heads sculpted by Mike Good.

These resin heads are crisply detailed and would permit you to remove the crude plastic head from your kit figure and use these highly detail heads to give yourself a first class figure.  

You can buy this and many other detail items directly from Ultracast.

Steve Bamford