Looking for a old video, help requested

[MJ4H]

I'm trying to track down a way to watch a particular episode of an old show and need some help. Willing to pay money for whatever medium we can get a hold off.

The show is called Quinn Martin's Tales of the Unexpected. The show is from the late 70s. The one particular episode is called The Final Chapter. I believe the show aired on February 2nd, 1977. The show aired on NBC.

If anyone can tell me how to track down this episode or help me look, I would really appreciate it. I have been searching a long time for a friend of mine who wants it. It would make a good Christmas present if I could track this down.