Thanks, John. That's what I found when I climbed up on the ladder and took a look at the good one on the left-hand side. It wasn't obvious with just the base on the broken one in place. The dealer in Denver (where I'll be on Thursday) didn' t have a new one, but there's one waiting for me in Seattle/Tacoma where I'll be early next week.
2005 Winnebago Vectra 36RD