Based on this product's specifications, here are some alternatives and similar models
Afriso draft regulator FR1, adjustable range 30–90°C, 3/4" connection (model 42294)
Summary description:
Afriso FR1 draft regulator is a mechanical flue gas/draft controller with adjustable setpoint range 30–90°C and 3/4" connection. Designed to stabilize combustion air flow and maintain optimal draft in heating appliances, it helps prevent overheating and improves burner performance. Suited for solid fuel boilers, stoves and chimneys requiring precise draft control.