I am looking for videos of the following TV series episodes which featured Tony Dow ("Leave it to Beaver") as a guest:

My Three Sons - Guest in the House (episode #4.37, originally aired on May 28, 1964)
Dr. Kildare - Four Feet in the Morning (episode # 3.9, originally aired on November 21, 1963)
Mr. Novak - To Lodge and Dislodge (episode # 1.2, originally aired on October 1, 1963)
Mr. Novak - The Death of a Teacher (episode #1.20, originally aired on February 4, 1964)
Mr. Novak - Johnny Ride the Pony -- One, Two Three (episode 2.11, originally aired on December 15, 1964)

I am also looking for videos of any episode that David Cassidy ("The Partridge Family") appeared in as a series regular:

The Survivors (originally aired in November, 1969)

Although only "My Three Sons" is a sitcom, I would certainly appreciate any help in locating these programs! Thanks!