We have a large number of the popular PLL KU-Band LNBs in stock, model number NJR2835S. They require DC voltage anywhere within the range of 12V to 24V, supplied by the modem via the signal cable. The full frequency range of this LNB is 11.7 to 12.2 GHz.
WR75 waveguide flange and a type F-female IF connector. Check out the data sheet via the link on the right.