These jackets could be worn with simple t-shirt and jeans, but my favorite look is military jackets layered over feminine blouses and flouncy skirts for contrast.
J. Crew utility jacket$148.00 (retail $168.00)
Joe's Jeans pant military coat, $123
Marc New York olive washed anorak, $129.00 (retail $215.00)
Merona utility jacket, $29.99
Another affordable option is army navy surplus. You can usually find a jacket for $20-$40, though figuring out sizing will be tough especially if you look online. I'd recommend checking out your local army navy surplus store, so you can try it on. Chances are you'll want to take the jacket in, but even with added cost of alterations ($20-30), it'll still be a relatively cheap piece and authentic!