Have you actually struck any objections?
I would think if anyone had recordings from way back that included me or my husband or any family member, I'd be tickled pink that they were being revived. As long as you're not aiming to sell them and get rich from it while I'm living in poverty....
We have old tape recordings from the 60s and gradually they're finding their way onto CDs but apart from the nostalgia bit, they're pretty crappy - amateur hour stuff!
Just ask the people involved if you can find them. Most wouldn't object. The Tony Rose project grew out of a request for old recordings and his family really wanted to do it.
Robyn