I don't know if this counts as sufficiently worth mentioning since I suspect it's wholly reissues and may already be out in the UK anyway, but Brilliant Classics seems to be about to be issuing a set of about 2 1/4 hours of Röntgen's "orchestral, choral and chamber" music (cheaply on mp3) around 12/27 that -looks- neat, anyway.
Here's the 2-CD set on Brilliant Classics:
https://www.brilliantclassics.com/articles/r/roentgen-orchestral-choral-chamber-music/ (https://www.brilliantclassics.com/articles/r/roentgen-orchestral-choral-chamber-music/)
All reissues - but great if you don't have them already.