Today, Bandai has announced that they will be releasing two Progrise Key Sets! These Progrise Key Sets are based on the one used by Raiders, as seen in Kamen Rider Zero-One. The first set, Progrise Key Set 01 is limited to Premium Bandai; the set consists of the DX Storming Penguin and Invading Horseshoe Crab Progrise Keys. Whereas, the second set, Progrise Key Set 02 is an Amazon Japan exclusive; this set consists of DX Crushing Buffalo and Splashing Whale Progrise Keys. All Progrise Keys within these sets are able to be used with other DX Kamen Rider Zero-One toys, but these are meant for the Premium Bandai DX Raidriser. Below are the corresponding image galleries for both products from Bandai and Amazon Japan:
Progrise Key Set 01 DX Storming Penguin & Invading Horseshoe Crab
Progrise Key Set 02 DX Crushing Buffalo & Splashing Whale
Pre-orders for the Progrise Key Set 01 will open soon on Premium Bandai, while orders for Progrise Key Set 02 are currently available on Amazon Japan. Both sets are scheduled to release in August and priced at 3300 yen, so essentially they are same for residents in Japan. However, the prices will obviously vary for international customers, as Set 01 requires a middleman service. Whereas, Set 02 can be ordered internationally through Amazon Japan. Nevertheless, for international fans interested in purchasing these sets, this might be a hassle so prep accordingly.
Source: Bandai Rider Toy Twitter