Yeah at least on the soundtrack the TLJ opening is the same as TFA, which is really frustrating (although I’m still holding out hope that it’s a new recording in the film itself, as Rian has said they recorded a new version).

As for substitutes, there are plenty of orchestral albums out there with recordings of the SW main title.

Also, as far as I can tell this film doesn’t reuse any old music (unlike, say, Rey grabbing the lightsaber in TFA), although there are many moments with similar arrangements of old themes, but they’re all new recordings.