Do you know where I can buy a military-styled jacket?

There is the DG2 Military-Style Denim Jacket.  This jacket is made from stretch denim.  It has gold-color ribbon tabs with antiqued goldtone buttons.  There is a round neckline with mandarin collar.  With a hidden hook-and-eye front closures.  It has princess seams on the front.  It fits close to the body.

The Hurley Newman YC Jacket is the next jacket I love.  It is a military-inspired fleece jacket.  It has a zip front with a priest collar.  It epaulets at shoulders for the extra military touch.  It has a faux button front and cuff details.  There is button flap hand pockets. 

And one for the men.  Marc Ecko Cut & Sew Bobber Jacket is the last one I recommend.  This is an updated bomber jacket.  It epaulets at the shoulders for more military feel.  It zips up the front.  It has two flap pockets with a zip pocket at the chest.  It is fully lined.
I hope this helps you in your search.  Thank you for your question.