I reached out to Desert Does It a few days ago and asked if they offered Seat Jackers for the 200 series or if they would consider building some. It turns out that they just built a prototype!
Here's the link: FRONT SEAT JACKERS (2008-2021 LAND CRUISER & LX570) - https://desertdoesit.com/collections/toyota/products/front-seat-jackers-2008-2021-land-cruiser-lx570?_pos=2&_sid=73a2c9518&_ss=r
Here's the link: FRONT SEAT JACKERS (2008-2021 LAND CRUISER & LX570) - https://desertdoesit.com/collections/toyota/products/front-seat-jackers-2008-2021-land-cruiser-lx570?_pos=2&_sid=73a2c9518&_ss=r