Here's a link to a blogpost about The Outside Man, done within the last year, showing photos of around twenty-five Los Angeles locations used in the film. (Some of the photos are missing.) The poster says the Medallion apartments were torn down and replaced by the IAC building, but looking at photos of the IAC building it looks to me as though it was just remodeled.
The poster also says that the French version of this film is slightly longer and includes an additional sequence filmed on Ventura Boulevard.
http://movie-tourist.blogspot.com/20...-man-1972.html