FHF Gear offers a pouch for the popular RINO GPS / Radio (models 120-750).
Retention is via an adjustable bungee like on many magazine pouches, it also features a drainage grommet and two dummy cord points. This PALS compatible pouch will also accommodate the Garmin GPSMAP series as well as the inReach Explorer, and the Alpha 100.
*This pouch will not accommodate the larger AA battery packs on the 500 RINO models with a joystick.
fhfgear.com/products/rino-radio-gps-pouch