Looking for new parts for an old Norcold 8662

I have a 1988 Travelmaster with the original Norcold 8662 frig. Got it running pretty good but wouldn't mind updating the gas control valve and ignitor. My gas control valve has Norcold part number 615518. This is nowhere to be found on the world wide web.

Does anyone know if there is a newer part number that can be used? Same with the ignitor.

Thanks,

Obie