Hi paradise56,
You didn't indicate where you are except small town NM. There is a good Cummins dealership in El Paso as you may already know. What was previously said about getting the info from the engine dataplate is the key to locating the correct parts. There may indeed be backorders but the dealer should be able to help you locate parts.
El Paso is home for me but I am currently living in Southeast NM for work. Don't know where you are but there are things to see and do while you wait for parts if necessary. I can provide some input if you can tell me where you are.
Hope you can locate the parts promptly and that fixes the issue.
Terry