About 5 or 6 years ago I picked up a used Viking 42" with sideburners and a stainless cart. At the time I replaced he cooking grids, cleaned it out, etc. It was probably 5-10 years old at the time. Overall it all still looks great and is build like a stainless tank!! There is a slow gas leak now the rotisserie never worked , and the ignition was never right. I look at the grill as a 300 LB stainless shell that'll last forever...The burners are in great shape. I'd like to put a high quality ignition and perhaps go through everything and tighten it up. Aside from viking factory parts, is there a quality electronic ignition I can put in there? Are the valves for each burner proprietary or should those be replaced?