There is a fairly intense softcore scene on xvideos. It may be from Bolero. I haven't seen that movie in decades, so I don't remember.

No genitals, but there are good views of the 70s pubes interacting. Rare softcore from a Hollywood star, but it's not "A Night in Paris" or even "Brown Bunny".

Per rules, I can't post the link here, but it's easy enough to find with google and: Bo Derek site:xvideos.com

Easy enough to download with JDownloader 2 Beta, which is a free shareware.

The name of the scene is "Bo Derek Hot Sexy Hollywood Celebrity Porn Sex Tape Leaked". Don't bother with the one that says she's fucked. She isn't.