Many good suggestions. Are you referring to the animated Disney Robin Hood or the live action Disney Robin Hood? The latter is actually my favorite Robin Hood film, a really underrated telling of the tale with Richard Todd and Peter Finch, scored by Clifton Parker who also did Treasure Island. I ask because you listed Treasure Island/Swiss Family Robinson, which are live action Disney films, but you also listed The Sword in the Stone.
Here are the scores you listed which have already been released (though I wouldn't turn down a reissue/expansion of some, such as the lovely Watership Down, which as you can see goes for big bucks on the secondhand market!):
Watership Down:
http://www.amazon.com/gp/offer-listing/B0000061UG/or:
http://www.amazon.com/gp/offer-listing/B014I302AM/The Man Who Shot Liberty Valance (released by Kritzerland not that long ago but unfortunately OOP; perhaps someone will re-issue):
http://www.amazon.com/Shot-Liberty-Vala ... 00N446QMK/Some Like It Hot (quite affordable):
http://www.amazon.com/Some-Like-Hot-Ori ... 000005Z5Z/Butch Cassidy and the Sundance Kid:
http://www.amazon.com/Butch-Cassidy-Sun ... 000023X81/(If you're interested, Kritzerland released Patrick Williams's score to the Early Years prequel, and MSM released Poledouris's final film score about the same characters.)
Son of the Morning Star (my favorite Safan score, released by Intrada themselves already but sadly long OOP):
http://www.amazon.com/Son-Morning-Star- ... 000000O6L/I would hold off on purchasing a pricey old Son of the Morning Star, because a few months back Doug Fake said on the main forum that Intrada actually had access to the complete score recording of this, and given their track record of championing Safan, I think there's every chance that they may get around to a new two disc version of this sometime in the next couple years.
I think the animated Robin Hood and Sword in the Stone got LP releases but only songs here and there on various CD compilations. Three songs from The Rescuers were included on a CD reissue about 10 years ago of The Rescuers Down Under. While the original film recording of William Alwyn's excellent Swiss Family Robinson absolutely needs release, there was a suite of three cues on a Chandos re-recording:
https://www.amazon.com/gp/product/B00118SXRM/Same goes for Clifton Parker's Treasure Island, although it is thankfully a much longer suite:
http://www.amazon.com/Film-Music-Clifto ... 0006SGF0A/Yavar