Was looking through some Northwest Airlines history stuff and discovered these images.
http://www.airliners.net/photo/Northwes ... 1192758/M/
http://www.airliners.net/photo/Northwes ... 0055563/L/
http://www.airliners.net/photo/Northwes ... 0055564/L/
Any one of these could be pretty interesting if modified (read: stretched) for PMDG's Jetstream 41. (I don't even own this addon yet, but may consider it if some talented repaints cover at least on of the above schemes.)