Some legally free Peter-Green-era FM covers collected over the years:
http://www.geonius.com/music/covers/greeny.html (some are no long available, such as those from the original MP3.com). Most or probably all of the "Black Magic Woman" covers are Santana-style.
I don't think "Yer Blues" had anything to do with Fleetwood Mac - IIRC, in fact, it was a parody of British blues solos playing the same note over and over again - definitely not Peter Green! "Sun King" was supposedly inspired by "Albatross". Other blues songs by the Beatles, off the top of my head, include "Why Don't We Do It In The Road" and "For You Blue" and, of course, "I Want You (She's So Heavy)".
The Rudy Rotta Band and Peter Green recorded a version of "Black Magic Woman", which has been discussed in past years on The Ledge. A Dutch band, John the Revelator at
http://www.johntherevelator.nl/, recorded some FM covers (not originals though) on their
Bluesproof album.
Probably my favorite cover/non-cover was an original by John Edmonds and his son, Andrew: "Can't Change the Past". First recorded by the father's Essex Blues Band (and can be heard at
http://www.mp3.com.au/EssexBluesband/Music), it is loosely based on "If You Be My Baby", complete with Peter Green-style guitar. I believe his son re-recorded a better version on his own later.