on Vista Vera, with Polyansky conducting the State Symphony Capella/State Academic Symphony Capella of Russia (1947 version- see here (http://www.vistavera.com/index.php?productID=1603), also mentioned on MDT as an upcoming CD.) No longer an unrecorded symphony, of course... but still... (Edit: ah. ok. recording made in 1994, don't know if it has been previously issued. editing accordingly.)
I don't have any record of this being released previously. So, even though the recording was made almost two decades ago, I've never heard it. Thanks for the alert.