dukw45,
I don't know anything about this - but I was pondering maybe one of the aftermarket adpater companies like

Novak - http://www.novak-adapt.com/

and

Advance Adapaters - http://www.advanceadapters.com

They might have something... ?

I am thinking maybe you should call them on the phone, and ask if there are some old truck guys there, or maybe someone at one of those places who knows someone who knows big truck/military iron... that they can point you to.

They may not be able to help, but they might be able to send you in the right direction.

It is worth a shot anyway.

-W