Not yet.

I got some more photos of the European 603 engine, compared with the USA engine:
http://www.meimann.com/images/mercedes/OM603_intake/
And, I bought the EGR mixer housing and both connector pipes. I plan to send them to Mosselman so he can play with them, and see if he can make a USA adapter for his kit. That is, assuming he's willing to mess with this at all. If not, we're SOL, unless we locate a full European exhaust manifold & turbo setup to install on our USA cars - d'oh! Anyone else interested in possibly buying the kit at ~$1600-1800 USD? Mosselman will be more inclined to make it work if he knows he'll sell at least a half-dozen or so. I have a few tentatively interested but that's it. I'll post more info when I call Mosselman again.