1984 summer olympics opening ceremony video?

Where can I buy/get the video of the 1984 olympics opening ceremony? Particularly the part where 84 pianists simultaneously perform on 84 grand pianos the Rhapsody in Blue by Gershwin. I have looked for this for years and have never found it. I looked on youtube. There is a ton of videos there from the 84 olympics but not rhapsody in blue. Does the olympic committee archive and sell videos of the games? If not it could help raise money for the games, as well as make them available to future generations. All answers are appreciated.