I want dual output LNBFs so I can get both polarities from any dish at any time. And a little off topic, but for more information. I am going to have to have separate C band dish for several satellites, so we can watch and/or record from several sources at the same time. Another reason for multiple dishes is that individual dishes can more easily be protected from the wind.
For the OP, I think the C2 from Satellite AV was a dual output LNBF. Brian may be sold out, but there may be some loose ones in satguys's storage boxes - ask around. Or maybe -- thin chance -- There may enough demand for a production run again... Should be worth finding out. I bought extras, but the wind has decreased my supply -- of lnbf's and C Band dishes. It would have been cheaper to have installed 4 protected dishes & I would have C band!