I have over 100 15ips 2 track tape albums (both one and two reelers), all purchased from the current vendors - Tape Project, UltraAnalogue, Yarlung, Opus 3, and others. One issue is that most of them, other than Tape Project most notably, are issuing their own material. So for these, the big orchestral pieces are much more difficult to do than chamber or solo, or small jazz combos. Opus3 has a few orchestral pieces as does MPS, which has released the Oscar Peterson set. Yarlung is looking to release their Mahler 5. All of these are with lesser known orchestras and conductors. Tape Project has released a few classical titles from Decca and Reference Recordings, which feature big name orchestras and conductors (and soloists). They also have several Blue Note titles.
However, getting rights and the original master tapes from which to make copies is not easy. Often many months of negotiations end with nothing, or worse, getting the master tape and finding it too worn or damaged to copy. There is also the problem of getting not only record company permissions, but also artists and sometime estates of artists. I had some experience here which followed my Decca book that I wrote for Winston Ma and First Impression Music. During the research, I found that one of my interviewees, John Dunkerley, has been the engineer for one of my favorite albums, Arnold English and Scottish Dances on Lyrita, with Arnold conducting the LPO. Decca did the production and engineering for Lyrita. It is one of the great sonic masterpieces. Anyway, I spent considerable time, at Winston's behest trying to get the rights for FIM to reissue the album, with lengthly conversations and correspondence with the Lyrita people. In the end, after a promise that the subject would be discussed at their next board meeting, all I received was silence, and more silence. The transfer of ownership of companies (and their rights) has made things more complex. So staying with your own artists, as Ed Pong (UltraAnalogue), Bob Attiyeh (Yarlung), Opus 3 and others do, makes some sense.
And it does cost a lot of money - I've spent as much as a nice new Prius on tapes, not including the two tape recorders I have. Of course, I also have 15,000 records and other tapes.
Larry