The old MKM, eh ?
Many of the K4V head parts are still available,
http://www.youtube.com/watch?v=xR33KfZa ... re=related
even as MKM FRP bits will be virtual unobtanium ...
However –
Dirk Scheffer of EDELWEISS MOTORSPORT builds and sells an improved & updated space frame
based upon the old Krauser design:

photo courtesy of Dirk Scheffer