Gonna be hard to find, it would have to be fictional. Fictional paints exist, but you would have to 'luck' into it.

Or, learn to paint it.

Anyway, your best shot is using Flightsim.com's search gizmo***

Type in "Northwest"

under 2004 jetliners.

You'll find 214 files to look through.



Later that day...nope not there, I was curious and I looked through them. Got a real nice OLD repaint on a 727-100

*** sorry Pete, but those files are extensive, read, HUGE!  And the search gizmo works better