Does anyone know where I can get a replacement ignitor for the above furnace? The OEM one is discontinued. I fabricated one from one I had ordered, and the old one, by brazing the electrodes on the new one. It will fire the burner, but it goes out after a couple seconds. I'm thinking the resistance is wrong, so the control board doesn't think the burner is lit. I replaced the control board, also. I attached a pic of the old ignitor.