There was, in that initial run of SCARS OF DRACULA from Anchor Bay, a bonus disc that had a video visit with Christopher Lee (shot in his home, I believe).  As Lee looked back on his life and career, he mentions "Peter" and goes on to add that he doesn't even have to say the last name.  (Everyone watching the video would know.)  He also discusses the last time the two men got together and that, when Cushing left his house and waved goodbye, Lee knew it was the last time he would see him.