If physical Soundtracks w/ codes run out, could we purchase them digitally somehow?

I was just thinking lastnight, I haven't seen a wind-up Bahamut in FOREVER. I never actually knew how to get it, and decided to look it up, discovering that it comes with one of the OST's, as do a great many other minions.

Thing is, it doesn't APPEAR there is any way to purchase the soundtrack with a code. And honestly, my only blu-ray player is now a boxed-up PS4.

As such, I'd personally really dig some kind of digital option, once the OST's run out or are no longer supported.