OEMPCWorld.com: ATP 256MB AF256UD-AP-OEM microSD Memory Card 80X Bulk
Industrial SD Card | 512MB to 256 GB | ATP Electronics
Amazon.com: Micro Center 256GB Class 10 MicroSDXC Flash Memory Card with Adapter for Mobile Device Storage Phone, Tablet, Drone & Full HD Video Recording - 80MB/s UHS-I, C10, U1 (1 Pack) :
AF4GUDI ATP 4GB Industrial Grade microSD Flash Memory Card
Industrial-Grade MicroSD/MicroSDHC Cards - ATP | DigiKey