Gerry, you might actually be in luck. After reviewing the parts list for the RM211, it appears that your jet is a solid turning, as opposed to the thin aluminum stampings found in later models. This is the type that is used in most residential stoves. Unless it is physically damaged, that thing should never wear out. If after cleaning the fridge
works fine, I wouldn't worry about it.
I did do a quick check on line for that part number, but no luck. If you really want to have a spare, keep your eye out for your model in an RV scrap yard and pull one from there.