Sparkfun is now selling the Ublox F9P L1/L2 GPS receiver module on a board ($219). The F9P supports GPS/Galileo/Glonass/Beidou and tracks L1/L2 data. It outputs carrier phase data and has survey-in and fixed position support along with RTK support (10 mm accuracy). Looks like the F9P has 1 time pulse output.