We are all set. The email to retail@argrv.com put me in contact with Sindi.  After providing VIN and detailed specifics, they gave me the info on just the right part number and I ordered it off their web site:  rvparts.argrv.com  They were great to work with.  Thanks to all. 
PS  My part # was 248283 and they included a PDF of the web site page so I could be sure.  However, you should confirm that your part isn't different, depending on your specific coach.