Joe Hill

Does anyone know where I can find a copy of this film? I saw this film back in 1971 and I thought it was a very good representation of the labor movement in the United States. I have been looking for a copy of this film since then but have not been able to find a copy of it. I even called the original distributor in the US and was told that the master copy was destroyed. They told me that a copy may be available in a film library. But I think the film is still being shown in Europe. I would like to get a hold of a copy of this film because my father played a small part in it, and I would like to show the film to my children.