Part Numbers I need to covert cooktop back to Natural Gas???

Hi, I was wondering if anyone could help me I just bought a used cooktop GE Profile model #JGP975SEK1SS and when I got home I saw that it had been converted to LP Gas. I went online and tried to find the part number for the Natural Gas orifice spuds but all the diagrams show the same reference numbers and there are a couple different part numbers so its kind of confuseing. I was wondering if anyone know which part numbers and how many of each orifice spud I need to convert this cooktop back to natural gas? Also this model is the one with the 18000 BTU burner so i wasnt sure if there were different orifices for the different BTU burners