On Saturday, December 19, 2015 at 6:56:16 PM UTC-5, Darryl Ramm wrote:
There is no excuse for a USA based manufacturer to be developing an ADS-B receiver today that is not dual-band/link layer.

On Dec 17, 2015, Bad Elf announced what they're calling a dual band receiver. Does this address your dual band concerns?

https://www.kickstarter.com/projects.../posts/1447126

The price went up to $549 on the dual band model, but it now claims to include non-toy AHRS and a rudimentary Flight Data Recorder.

I'm not saying that this is legit, but it is interesting.