Instead of looking for an option that can result in a $10K fine, maybe you should look at taking an inexpensive and common CB radio and making it look more military. Some OD green paint and a couple fake rack handles on base-station CB would give you the "look", keep you legal, use common antennas and accessories, and be much cheaper overall.
Is the OP still around even?
Example: Take this radio (operates on 12v) and pull the knobs off. Then mask the display, mask the push-buttons, mask the mic hole, and plug the phones hole. Then cut out small bits of tape to cover the words and such, then blow some OD green over the whole thing.