Just found this on eBay. I assume it's a foreign key. Seller says he's in Tawain.
Looks a lot better than our OEM keys. Think it would work? I know the standard OEM key from the other models he has listed will work on our cars.

eBay: Ford Logo Blank Key Mustang Taurus 97-05 F150 99-04

 

This is a non transponder key. I believe it won't work in the ignition.

 

It'll will open the door and turn in the ignition, but it will not start the car. It's not a PATS key.