Based on this product's specifications, here are some alternatives and similar models
Virtual Wall barrier for iRobot Roomba series by JETtools SB9255 — compatible with Roomba 500/600/700/800/900 and i/I/ E series
Summary description:
JETtools SB9255 virtual wall creates an invisible barrier for iRobot Roomba robotic vacuums, preventing access to selected zones. Designed for compatibility with Roomba 500, 600, 700, 800, 900 series and i, I, E, I6, I7, E5, E6 models. It is a consumable/accessory item used to control cleaning boundaries and protect fragile areas or exclude rooms during automated cleaning.