Flexible 16 " Long Range Antenna Garmin Astro 220/320 - Alpha 100 GPS | eBay
Amazon.com: Case Cover Compatible with Garmin Astro 220, Made in The USA by GizzMoVest LLC COF. : Electronics
Amazon.com: Extended Long Range Flexible Receiver Orange Antenna for Garmin GPS Alpha 100 200 Astro 220 320 430, Eifagur : Electronics
Astro® 220 | Garmin
Amazon.com: High Gain Long Range Magnetic Base Replacement Antenna Compatible with Garmin GPS Alpha 100 200 200i Astro 220 320 430, Eifagur : Electronics