Joetsu Electronics’s own PlayStation Vita grip now available on the Amazon Japan. This grip with giant cover buttons and ergonomics shape already released in Winter but it was available in the selected stores next to the official ones.

The grip cover at the moment available on the Amazon only for the PCH-2000 series but in the mid-March release for the older, 1000 version.
The price is 3218 Yen (with tax). You can buy it from here: Amazon Japan