I wrecked my Excursion. Looking at aftermarket Grilles Some say Excursion/F250/F350 but some show only F250/F350 (Model year 2000).

Found a grille I like, but it doesn't show fitment for the Excursion.
Are they 100% interchangeable (Excursion/F250/F350)?

This is the Grille I think I want:

 

If its for the same year SD it should fit your EX, front clips are the same between the two.

 

Yes, that should fit your truck with no issues.
I'd like to see some pics of the actual product and the final install.

 

since you say you wrecked it, now would be the time to update the front end, go the easy way and get an 05-07 front bumper, headlamps, and grille (youll also need the mounting panel). or a little newer and 08-10 front end that needs fenders too. not sure if the hood is the same.

 

I already ordered this bumper on Amazon (click the image at this link to see a better picture)

 

Okay, so I think I’ve figured this out…

The Excursion Grille has a grid pattern (squares a little under 2x3”)
The Superduty Grille has a pattern of horizontal bars.
So, Ford would show a different part number for the F25 SD & F250 SD than the Excursion.

And, the aftermarket Grille retailer probably went by Ford part numbers to figure out
which vehicles are applicable. So, they don’t list the Excursion when they list which
vehicles it fits because the F250 SD & F350 SD are a different part number than the Excursion
– even though it is interchangeable – especially interchangeable since it looks like neither of those.

And none of them look like this:

 

You will probably need a header panel. How is the cross member for the radiator?

 

Couldn't PM you. Sent you an email instead.

 

The insurance is paying the body shop for the repairs.
I'm getting anew bumper and grille - made an agreement with insurance and body shop
where they will credit me for the value of the grille and bumper.
All the rest of it is being handled by the body shop - they will inspect and replace everything
else that's damaged, and will install the aftermarket bumper and grille.
I'm just hoping the bumper and grille arrive quickly. Both have been ordered now.