Mobile play of out-of-catalogue items

I have some old CDs and some which will never be on a streaming service which is unfortunate as they are some of my favourites. The Orchestral Tubular Bells and Dodo & the Dodos 2 are just a couple.

In order of ease:

1. Mobile play of out-of-catalogue items using Apple Music
2. Mobile play of out-of-catalogue items using Plexamp
3. Mobile play of out-of-catalogue items using Spotify