I just did a check on the Test Server to see if something has been done with this.

I did find one thing that I could call progress, but it's still not real accessable just for sake of replaying music. The music item I named in the original post is available as Fanfare #8 from the Legion Libretto. But of course, this is only usable upon paying for and entering the Legion area. I will likely use that music from the final battle of A Shantotto's Ascension (Fanfare #8) if I ever do Legion on the production server I am on (Siren) once the feature has been moved into production. The only problem with that is I don't see myself doing Legion much. The people I play with are having a hard enough time with some of the Voidwatch NM's, and I keep hearing that Legion is significantly more challenging. So there doesn't seem much of a chance to do it.

I would still like to see an update to the NPC Oshi Shomahl inside Kokba Hostel at position L-10 in Aht Urhgan Whitegate to include that tune and several others intruduced to the game with content starting with Wings of the Goddess and later (and maybe even a few tunes added late in the Treasures of Aht Urhgan expansion too).

Since the Kokba Hostel seems to be very under utilized (it never seems to be busy), I won't hold my breath for a change. But I can still hope. It may be better to ask for some other implementation of a service like this, although I don't have any good suggestions on where it should be.