SACD Test Reference Disc

Has anyone come across a SACD test disc that contains reference tones or signals for 5.1 as well as 2 channel stereo? My Sony SACD player has a built in test tone generator but, because I cannot balance the rear channels, it is suspect. Any help would be greatly appreciated. Also, if anyone has any novel approaches to SACD level setting I'd appreciate hearing about them as well. Thanks in advance!

There are two that come to mind. The original DMP SACD-Surround sampler and the Telarc 1812 SACD both have level-check tracks on them.