Here's an interesting library release on the St Germain Des Pres label (sub-label of Editions Montparnasse 2000) titled Opus 3 14 16. I was under the impression that it is somewhat rare (a couple of library music enthusiasts asked me for it), though Discogs has just now possibly disabused me of that idea as there appear to be copies available for reasonable enough prices. St Germain is a favorite little library label of mine (I adore their sleeve design, and they have some incredible releases from Alessendroni, Jacques Siroul, Macchi, Iaccouci, etc. you can look it up and probably already know). This release is an interesting one with a sound of its own, and quite good I think. Credited to "Unknown Artist" on Discogs, the songs are composed by A Sainz and L Sainz (all of them but two credited to both of them) so I've just designated them as the artists. It's a solid release that I enjoy quite a bit - I wanted to share it and I hope you find it as enjoyable - here's the link.
(If you're looking for a particular, hard to find library - or soundtrack, or whatever - album, feel free to get in touch and I'll see if I have it.)