Gray Parker Service is releasing the Shin Ultraman Neronga and Gabora. These plush are big being 98cm and 93cm in length respectively (over three feet), each retails for 9,350 yen on Amazon Japan (US shipping not available). They can be pre-ordered here and here with release scheduled for May 2022.
Update: there are smaller versions featuring a keychain loop, and having a soft underside (screen cleaner, etc.), approx. 10 to 12 inches long, and retailing for approx. $45. Both can be purchase from Tokullectibles with shipping to the US.