The White Rodgers Gas Valve is now obsolete and has now been replaced with the Honeywell VK Series kit. The part number for the Natural Gas valve kit replacement is 202748 and part number the for the Propane version is 202749.
Is the White Rogers Gas Valve still available for my Vision Radiant heater?
Looking to upgrade your old heater? Look here for information on which product is the best like-for-like replacement.