I have a large diameter bezel on my choke cable which appears to have a smaller diameter thread than the other 3 heater controls. I have one large bezel with the larger thread but it's not in good shape so I know they exist. I can't find the large diameter with the large thread anywhere. I called British NW and they didn't know what I was talking about. TRF doesn't return my call and I haven't had much luck with Moss in the past. Help!