After years of pining after Botcon Scorponok, I took the initiative to make a headmaster port that will work with G1 and 3rd party heads (such as the deathstalker I have pictured) If anyone is interested you can buy the part on shapeways, though for all intents and purposes, I had this with my classics display in mind.
The pics are of a black print, but I think I'm going to reprint it in green now that I know it works. Check out the shapeways listing here:
http://shpws.me/L9F0