I have two red-push attenuators available (one is by Yerringto, not sure about the other anymore). I recently got an ISF calibration done by Gregg Loewen of Lion Audio-Video Consultants (fantastic job, by the way), and don't need them for my Mits WS-65819 anymore. I'd be glad to send them to someone who does need them. No charge, of course. Private mail me if you want one or both.