IN all likelihood you can still buy what Broilmaster called "valve hoods" if I recall the term correctly. I remember many LP dealers sold the conversion parts directly from Broilmaster. I would not be surprised if they still use the same valves. Basically conversion always simply consisted of buying the correct "hoods or orifices", and the correct line and regulator. So even though back then the grills were made by Locke Stove Company don't be shocked if everything is still the same with the valves