No copies of the tape are known to have been made public.

Only one copy of the original film is known to exist and parts are now lost.

No copies of this film are known to exist today.

Only one copy is known to have survived into modern times.

No copies of this radio series are known to exist.

Only one copy of the film is known to exist.

If he did, no copies are known to have survived.

So far as I am aware, no perfect copy is known.

No copies are known to have survived to the present day.

No copies are known to exist, and it is now considered to be a lost film.