I should have mentioned in my first post .
Searching for Dodge Brougham , could be part of the problem with an internet search .
You need to start with the RV manufacturers name ,( Winnebago ? Star Craft ? ) then the RV series ( Brougham ) model info ( usually length ) on a Dodge Chassis , for best search results .
But if the manufacturer went under before the internet became common , then there'll be little out there.
EDIT: OK I've learned something today . Time to rest my tired brain.
Brougham , was the name of the RV manufacturer ; in business mid 70s till 1985 ; and from what info there is on the net, appears they only built on Dodge chassis .