Has anyone used this yet?

http://www.skyguardtwx.com/UAT_Transmitter.html

Much less expensive then current panel mounts, awaiting TSO-C154c certification to be completed.

Since I've upgraded to the Stratus 2 I've enjoyed occasional ADS-B traffic in Foreflight, this would give me traffic all the time when I'm in range of an antenna.

The biggest problem I've got now is running out of accessory plugs.