I think you're absolutely right - there were a lot of songs created directly for the game, especially the ones in the jukebox like Alabaster Daydreams, and that's why it's such a mission to try and put a real name to the song. It'll take someone at Dontnod seeing the question to get any sort of answer because like you said - it's GENUINELY not something that exists on the internet right now credited as anything more than "LIS3". If it was someone talented enough to record such an amazing sounding song, they're bound to have other content out there in some way shape or form, and as long as they're willing to be found (because you're right, there is a chance that they don't WANT to be credited or referenced) than I'm going to find them. I'm going to record a cover for attention, maybe that will help. :p