Seatbeltplanet.com's™ 1981-Early 1984 Toyota Land Cruiser FJ60, Rear Driver, Passenger & Center Seat Belt Kit. 3 Point Retractable Lap & Shoulder Seat Belt Kit with End Release Buckle
If your Land Cruiser is from 1984, check for a double bend bracket on the retractor which requires the "Late 1984" seatbelt.