There are copies on amazon
This rare and very good TV movie is avaialble on Amazon. Here's a link:
http://www.amazon.com/gp/product/6301560949/102-2681017-5670557?ie=UTF8&tag=edgevideo-20&linkCode=xm2&camp=1789&creativeASIN=6301560949
The date I looked, June 14 2007, 2 of the the 3 sellers say not the Valerie Harper edition, but Jeff Keel, Guy Ecker, which is 1989.
Though main Amazon.com site has the Valerie Harper VHS which leads to these sellers.