I feel your pain. My friend, who's pretty well-connected, was trying to do the Abdul-Hannan LP, which is David S. Ware's first appearance on record. He found Abdul-Hannan, had access to the tapes of this privately-issued gem, and due to various difficulties (not the least of which being a request for absolutely obscene amounts of money) he finally dropped the idea. So whether it's something that seems "fairly obvious" or a piece that barely registers a blip on the radar of all but the most obsessive, it can be a real headache to secure the rights to reissue something. I suppose that's partly why bootlegs and the blogs are flourishing.