If I could still wear my dress blues, my wife would probably be a lot friendlier. It is indeed intended to be tailored tightly and worn by a thin man.

I would stongly counsel finding another source if only because it'll be less trouble and cheaper. When I see someone not a Marine wearing the uniform, I just chalk it up to ignorance and not a purposeful slight. And I would certainly not think you were slighting the Corps--our blessed, grand, and glorious Corps which is almost 235 years old!--but you'd have to do a lot of work to keep it from looking like a dress blue blouse. Otherwise Marines would spot it right off and tend to . . .well, scoffing would be nice.

Finding a generic police tunic might indeed work out the best and the least expensive. Keep us on mind when you take photos.