Sleeping Cars Assignment Of Space - Circular 2909 (1950s) And Circular 3005 (1960s) - Inquiry

In the 1950s, Frisco issued circular 2909, with numerous later supplements.

In the 1960s, circular 2909 had been replaced by circular 3005, with numerous supplements.

Both of these documents spelled out how space in sleeping cars was allocated for sale to various downline stations.

Do any copies of these circulars or supplements still exist?

Bill