My compliments to the International Film Music Archives on an eclectic collection of unreleased film music on YouTube.
There’s a bunch of rare early Horner:
P.K. and the Kid was released in 1987 but actually made in 1983. It’s one of those early pastoral Horner scores where he was leaning heavy on Goldsmith.
The IFMA also seem to be scrupulously avoiding anything that was commercially released.