Zwift has discontinued the Run Pod. I checked their list of compatible devices Compatible Hardware, and the only run pod/stride sensor that appears to be available in the United States is the STRYD Footpod and it costs $299.
I’m trying to get set-up to run on a treadmill in the gym. A Runn treadmill speed sensor really isn’t an option for a “public” treadmill.
I switched to a Scosche Rhythm armband HRM, it also sends cadence data. While not as accurate as a footpod, it’s close enough, and doesn’t have the connection issues my runpod had.