I would also consider buying a download, but it seems rather expensive at full price (for what it is; the 50 year old soundtrack in 16bit/44,1kHz without booklet); I was somewhat hoping LLL would release it after they released AIRPORT 1977 from the same composer.
qobuz is often more expensive than others. I often look on 7digital first therefore. Just looked, in this case it is 15,59 vs 13,59 – I think with qobuz subscription you get it for a little less, right? – but I saw downloads on qobuz go for nearly two times as much)
Who knows, maybe LLL will release it expanded as well at some time. There is no AIPORT left except the original unless I am mistaken? Schifrin’s unreleased STARFLIGHT ONE would thematically fit though 😉