RCA and AntennaCraft (Radio Shack) are the only ones that still offer dual inputs. The AntennaCrafts are always dual input, the RCA is switchable between combined and separate.
Everything else out there is ultra wideband with the exception of the Winegard LNA200. That one has a single input and a U/V diplexer built in so that there are separate internal amplification paths internally. That extra diplexer and other input filtering is also why the measured noise figure is well under their claims (on the unit I've tested).
Tech support for Antennas Direct