Here is one, not very good, but you asked:
http://www.rolandus.com/products/details.asp?CatID=8&SubCatID=39&ProdID=VA-76&PageMode=15

That's all I could find

Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer