Amazon.com: Readytosky M8N GPS Module Built-in Compass with GPS Antenna Mount for Standard Pixhawk 2.4.6 2.4.8 APM 2.6 2.8 Flight Controller : Toys & Games
U-blox GNSS Multiband Antenna | Stereolabs
10 pcs ublox neo-6m GPS module w/Taoglas Antenna serial port output, USA seller | eBay
SparkFun GPS-RTK-SMA Kit - Includes GPS breakout- Magnetic Mount Antenna- Ground Plate & USB-C Cable - u-Blox ZED-F9P & RTK- High precision accuracy in milimeters- Both Rover & Base station operations: Amazon.com: