Hi,
As mentioned , Tezuka's 1965 "Treasure Island" telefilm was dubbed in English. I've spoken to cartoon historians Fred Patten and Jerry Beck about the movie, and both men are certain that they viewed a rental copy from a 16mm film rental bureau (using these places was a popular-- albeit somewhat expensive-- way of enjoying rare films before VHS took hold in the 70s).
I've done some googling and made a couple of phone calls, but cannot find the dubbed version of this show. I'm intensely curious, I love old dubbed material! Has anyone seen it? Does anyone know of a rental bureau that still has a copy?