I had every intention of doing more work w/ this collab, but I've had loads of family stuff to do and I'm sick with a cold. But I found a few things... here's one: Meet Your Federal Government, a 1950s b&w filmstrip about the branches of government. There was a few things I thought may be useful:

2:10-2:18 still shot of the constitution (preamble)
9:59-10:03 exterior of supreme court building
10:12 - 10:16 “equal justice under law’ inscription
10:39-10:51 cartoon courthouse with justices and word “judiciary” underneath

http://www.archive.org/details/meet_your_federal_government