I am looking to purchase a Sony Satellite Speaker for a 7.1 setup. The model # is SS-MSP1. It is a small satellite speaker that was part of a Home Theater In-A-Box package I bought a couple years ago (HT-5100). I have since upgraded everything except for these satellites and need an additional one for my new receiver. Any ideas where I might find one? I've checked eBay and Sony doesn't sell them seperately.