Stub Flex Antenna for Garmin Astro/Alpha – Havoc Hunting Supply
Collar Clinic: Extended Range Antenna for Garmin Alpha/Astro or PRO Trashbreaker
Garmin Astro 430 Long Range Antenna Bundle
Long Range Triple Magnet Base Mount for Garmin GPS
Garmin Roof Magnetic Mount Antenna for Alpha and Astro
Garmin Astro 320 / 430 GPS Flexible Long Range Orange Antenna 18" (Long Range) | eBay
Standard 5" Antenna for Astro 430 (2-pack) - Walmart.com
Long Range Magnetic Truck Mount for Garmin GPS Systems
Amazon.com: High Gain Long Range Magnetic Base Replacement Antenna Compatible with Garmin GPS Alpha 100 200 200i Astro 220 320 430, Eifagur : Electronics
Garmin Alpha Astro 42 Inch Long Range Metal Antenna - Gun Dog Outfitter