Thanks for the info, just called WCB and they are out as well.
Try looking at some Stereo Shops. Scosche batteries are made by Odysey(sp) and run about the same price. My buddy has 1-PDX1.1000 and 2-PDX4.150's and can run on the stereo battery for about 4.5 Hours at about 3/4 volume. Then he turns off the subs and it goes for at least another hour before we head back.