I don't know if this project is still alive, but I will keep an eye in this thread from here in Brazil.
I don't think it will be as easy as in USA to find a donor, and maybe the cab of my Chevrolet Veraneio (a SUV made with a body from GMBrazil and a frame from 1967-72 GM truck/SUVs) will be as easy to fit a modern dash as in yours "squares", but maybe someday I will make this upgrade...

BR