Take a look at Bud's Police Supply
for a list of manufacturers who evidently have programs. Either the manufacturers or Bud's seem to limit the number of firearms sold as I have seen some models available for regular commercial sale but out of stock on the police side. I have a Colt AR on layaway there. Be careful about Dan Wesson 1911s there, however. I've actually seen them higher priced on the Police Supply site than on the regular commercial site -- if they're available at all.
Jim's Rules of Carry: 1. Any gun is better than no gun. 2. A gun that is reliable is better than a gun that is not. 3. A hole in the right place is better than a hole in the wrong place. 4. A bigger hole is a better hole.
no guns = might makes right