Windows on the fuselage
Juice:
You could try importing your picture into a paint program, resize it to the size of your cut out, touch it up, print it, laminate it, then stick it to some thin (1/16) plexiglass. Then mount the plexiglass in your hole.
This should look close enough to the real thing to pass a cursory inspection.
Good luck!
MV
PS However you do it, post a pic when it's done, I'd love to see it.