Rear burner valve seized up and I ruined it trying to take it apart. Looking for working used one or source for a new replacement. I've found some online but I'm not sure if they will work on mine. It's described as: aftermaket Weber single brass valve - 36400 It looks close but not identical to my part. Does any one know if this will work on my grill? Or do you know a source for a new or used one? The old one has HN034 on the front and DIN-OV6W on the back. Thanks from a Weber newbie, Sean