Looking to buy RSX-5 (2 in silver), RSX-4 (2 in silver), RCX-4 (1 in silver) and the RPW-10. I have been calling the dealers listed on the web site, but nobody has the RCX-4 or RPW-10 in stock. Do these parts actually exist? If so, where exactly can they be purchased? Klipsch really makes this product difficult to purchase.