When I fixed to wipers on my 1999 Southwind, I ran across this little gem.
Its a catalog of wiper parts for from Denso that Fleetwood uses.
This may help you find the correct blade assembly.
Scroll down through the article, the link is near the bottom.
http://www.1999southwind.com/windshi...to-much-sweep/
When I put new blades on it, CW had the replacement blades. They aren't the typical automotive blade. These have a bolt and nut that hold the blade to the arm..