I'm sorry, but there's just nothing
there to make a foundation mod
out of. The series isn't about space battles, or the technology, its about the
people -- and thats almost all thats in it! How many ships can you describe, and their abilities relative to each other?
A) One of the "local kingdoms" found a Imperial battle cruiser that was, apparently, hot stuff at one point.

Imperial ships kicked the
ass of the Foundation in the one war they had with them -- they lost because of politics, not the military.
C) The foundations ships were
really powerful toward the end, with thought based computers.