From Amazon
Sony 64GB SDXC Secure Digital Flash Memory Card - EXTRA PROfessional Series Class 10 UHS-II/U3 (Read 260MB/s Write 100MB/s) - SF64M, SF-M64/T
The product is available from £38.00 at international stores.
Gadcet
Sony 64GB SDXC Secure Digital Flash Memory Card - EXTRA PROfessional Series Class 10 UHS-II/U3 (Read 260MB/s Write 100MB/s) - SF64M, SF-M64/T
OnBuy
Sony 64GB SF-M/T2 UHS-II SDXC Memory Card