can't seem to buy this on dvd?

I have versions of most the writer's plays on dvd but it is hard to get any version of this play on dvd.
Certainly have never seen this version on dvd.

The BBC have done lots of versions of the plays over the years but their recent boxed sets don't include a version of this.

Had to buy the RSC Paterson Joseph of this,sure it will be fine but where is this big star version?

People say Bill S's plays are out of date but I feel they are eternal stories.

It is July 2016 and the British government is using this play as an instruction book on how to destroy each other.