Recommendation for high sample rate receiver?

Hello,

I am hoping someone on the list could suggest a device that receives in
lower L-band (1.0 to 1.6 GHz) and can cover 6 MHz (+/- 3 MHz around
center) at (and here's the trick) 500 MS/second with at least 8 bits of
resolution.  I'm looking for 2 ns baseband samples from multiple
receivers to perform trilateration.

Thank you!