Is there a source for these? I'm missing my passenger side small insert. All help appreciated.

 

Looks like they only come as a whole unit. 2000 FORD EXCURSION Parts - Tousley Ford Parts Depot I would check ebay for one. You will probably only find the whole grill though and for the price of an older one you can update your grill to the 2005 style. You could always check your local salvage yard to see if there are any Super Duty's and snag one that way.

 

The SD grills are one piece, so that won't work.
There is a guy selling a whole X grill on epay. The center section is missing a piece and it has no bids at $9.99 so maybe if it doesn't sell you could get just the side piece you need from him.

I wish I could find a grill from an X for my SD, I really like the way they look.