What is the current replacement for a Honeywell C586A gas valve? I may require 2 or three of them as I have an old denture boilout unit built by Coe Built that has finnaly given up on me. The space it fits in is customized and I would rather replace the gas valves than try to retrofit a new boilout unit in this space.

Take the old gas valve to any hvac company or suppier to let them match it up. That's one old gas valve but the will have a universal that will work.