At
Truckaddons.com they list Putco stainless steel trim for 99-03 Ford dually. Check the Ford drop down menu.
Maybe you can find it by part # cheaper somewhere else?
Much cheaper here
LINK It does say for Dually.
I googled the putco part # P4597217
<TABLE cellSpacing=0 cellPadding=2 width=768 border=1><TBODY><TR><TH class=f2 align=left>
P4597217</TH><TH class=f2 align=left>
Putco Stainless Steel Fender Trim for 99-07 Ford Super Duty Dually Box - Full</TH></TR></TBODY></TABLE>