iTrakit: GPS bike tracker. Fits in frame. | Indiegogo
Best GPS Bike Trackers: find and follow your stolen bike | Cycling Weekly
GPS Vehicle Tracker Real Time Locator GSM Motorcycle Car Bike Anti-theft Tool GSM/GPRS 850/900/1800/1900Mhz GPS Tracker UBLOX
SpyBike GPS Tracker is like LoJack for bikes
Amazon.com: PerfiPro Airtag Bike Mount, Hidden Bike GPS Tracker Case for Apple Airtag, Airtag Bike Seatpost Reflector Mounts, Anti-Theft Airtag Holder for Bike, Electric Bicycle, Scooter : Electronics
DESIGN TEMPTATION: SHYSPY GPS tracker for bicycles