Hi James and Welcome to the Forum!
Since Coachman was purchased by Forest River, they might be able to help.
Read this statement by Forest River regarding Coachmen parts:
"we will and are doing our absolute best to satisfy customer needs for parts of old CRV products and we are processing orders daily for such parts through authorized Coachmen RV dealers. We believe that we can attain most parts; however there may be some parts that are simply no longer available. In such cases, we believe that we can identify suitable, alternative parts."
Here is the link to the entire document which includes contact info: