Something close to Mahler, which is not really Mahler, is the so-called Mahler 10th symphony (in the performing version by Deryck Cooke), since Mahler skethed much of the music but died before it could be completed and orchestrated. Admittedly, this music is much closer to the Mahler 9th symphony than to the 3rd or 5th, but still an intruiging work, that is rarely heard.
Try the version by RSO Berlin, Riccardo Chailly conducting:
Decca 466 955-2.
Try the version by RSO Berlin, Riccardo Chailly conducting:
Decca 466 955-2.