20th 2017 they released a set called High-Class GX Battle Boost. It released in Japan for 55 USD I believe.
High-Class GX Ultra Shiny was released this Nov. The item "Pokemon GX Ultra Shiny High Class Japanese Booster Box Sealed USA SHIP" is in sale since Saturday, February 2, 2019.
This item is in the category "Toys & Hobbies\Collectible Card Games\Pokémon Trading Card Game\Pokémon Individual Cards". The seller is "poketomspokemon" and is located in Scottsbluff, Nebraska. This item can be shipped worldwide.