One thing that I marvel about with Paul's 109 work is not the frame, which is easily enough fabricated/rebuilt with enough $$$, the real beauty of the work is the ENGINE!
Not many DB601's in decent condition these days, and from what I recall, they rebuilt one entirely for Paul's Emil.
You should try bending sheet metal someday, or maybe forming that Emil's cowling. You will very quickly realize why there is such a limited number of exotic aircraft in existence.
As for engines, there is talk of new sand molds to replace the very limited number of blocks available. That and heads and banks are the limiting factor on these engines. Pistons, rings, valves, cranks, and cams exist.
Rare = DB801's, but somehow many of these are popping up too.
Truly rare = Nakajima Sakae engines.
