As you look around, most of the early sedans had the SPI motor (except ones marked "ZTS"
which had the Zetec & a rear sway bar the others didn't). So looking at hatchbacks will get you the Zetec motor mentioned....
Newer cars got the duratec engine that's another improvement, but too new for dirt cheap unless dinged... (grin)
Hope that helps in your search, and Welcome!