Best bet would be to go to some of the websites that specialize in kits, and build it yourself......not only would you save on the excise tax by purchasing one not yet built, but most of the vendors offer discounts for LEO's.
Call Kielser's in Jeffersonville. They deal primarily with LE. Call and get a price and then if you can get your Chief or Sheriff to sign a letter head for you, you'll get one at a price that's worth it. Look them up on their website.