Bandai has revealed an up-coming Heavy Infantry Mandalorian figure for their S.H. Figuarts 5.5" action figure line. Since Bandai isn't allowed to sell their Star Wars S.H. Figuarts action figures in the United States (Hasbro holds the license), this figure will be exclusive to Japan. It'll cost ¥ 12,100 ($114.52) and will be a general release, which means you should be able to import it through Amazon Japan for example.
Pre-orders open up in Japan on October 1, 2020 and the figure is expected to ship in February 2021.