Amazon.com: High Gain Long Range Magnetic Base Replacement Antenna Compatible with Garmin GPS Alpha 100 200 200i Astro 220 320 430, Eifagur : Electronics
Conkey's 14 inch Flexible Antenna for Garmin Alpha 100 Handheld (Flex-14AL) Conkey's Outdoors
Garmin Astro® 430 | GPS Dog Tracker
Amazon.com: Bingfu External Waterproof Active GPS Navigation Antenna with MCX Male Plug Connector 3-5V DC Compatible with Handheld Portable Garmin GPSMAP 72 76 60 60C 60CS 60Cx 60CSx Lowrance GPS Receiver Modem : Electronics
Conkey's 14 inch Flexible Antenna for Garmin Alpha 100 Handheld (Flex-14AL) Conkey's Outdoors