For the 70's and 80's you need some kind of 'hjsplit' or something like that (to join the files). I don't have that either, but von kusiemski said that he would reupload the 70's and 80's when he finds more time.
In the meantime, you can download all the other clips that he has posted. They all work for me.
Wonderful job indeed, von kusiemski