American Playhouse

The American Playhouse presentation of "Seguin" in 1982 was excellent. It was true to life an dwell acted. I used to teach Texas history and wanted to use it for class, but was unable to purchase a copy. Now, I would like to use it to help my students understand point of view in my AP World history classes. This is the only film I am aware of that shows the Texas Revolution from the perspective of the Hispanics who fought and died to stop Santa Anna's dictatorship. It shows that the fighting was not just white v. Hispanic, but political in origin as well. I had tried contacting the station that aired the film (PBS I believe) but was told there was some fight over the ownership of the film. This much later, I hope the argument is settled. Is there any way to purchase this film? Thank you.