Thanks to Jerry Kacey at Kacey Enterprises,
Kacey Enterprises » Kacey/Eli Adapter
I now have a couple of Elinchrom to Hensel mount Adapters. Really built well, the Elinchrom side is a more secure mount than the original Elinchrom configuration, but it's a wee bit harder to attach when the modifier ring is free spinning. Don't care, more secure is more important to me.
Now I can use Eli Mods including a lot of Rotaluxes including the delicious 39" Deep 0cta ... and my Giant 7' and gobo box on all three of the lighting systems I use ... Profoto D1s, D4s, Hensel Porty and Mini 1200, Elinchrom Quadra.
Now to figure out how to get Profoto Mods onto the Porty heads, and I'll be all set. Shouldn't be terribly hard to make happen once you get into it.