Unfortunately, I have no way of transferring these things to MP3, so I've spent a large portion of the morning searching for them. I have found out that the Grendel song, at least, was written by Kathy Mar and Leslie Fish, who are apparently something of major forces in the filking community. I still haven't found anything called "Quirks and Quests" yet, and there's not a lot from them in the way of CDs ... but it is at least a start.
BONUS ITEM! I did finally find the soundtrack to Süleyman the Magnificent, which I've been searching for ever since I recorded a piece off of the radio in 1990 or so. Awesome!