ABC Warehouse is the only place I can find to buy these cables online. A wholesaler I deal with carry most of the cables I need, however they don't seem to carry either the Pro Series digital coax or subwoofer cable. Anyway, I tried placing an online order with ABCw last evening, but I received a message saying that it cannot process my order because they are unable to validate my billing address. I just tried calling them (within business hours) and was forced to leave a message courteous of an automated teller. As the situation is not looking bright, I'd like to begin looking elsewhere to find these cables. They'd be paired with other Acoustic Research Pro Series that are already ordered, so I'd like to keep the setup uniform. Thanks for any help.