Lever-handle PRV

I need to replace some leaking pressure relief valves on some older soda kegs. They are the smaller lever-handle kind, which I think is an older Firestone model. I can't find any online catalog listing these. CHI Company shows them in a photo but doesn't list them (and doesn't answer the phone), and nobody else seems to acknowledge their existence.

If I can't replace the PRVs, I will probably have to replace the lids, or drill out the valve seats and replace with the big threaded insert PRVs (which are about the same price as replacement lids).

The new pressure releif conversion is your best bet. The small metal flipper style pressure relief isn't available anymore. I think you will have to cut it out and use one of these
http://www.nybrewsupply.com/beer-ho...keg-lid-pressure-relief-valve-conversion.html