I know the request has to be sent in on agency letterhead. I believe it goes directly to Glock and they ship directly to the agency. Best bet is to call them and ask. It'll take a while, as they have to order it from Austria.
You could also find a Glock police distributor and ask them, but I'm almost positive it all has to go through Glock in Smyrna.
You could also find a Glock police distributor and ask them, but I'm almost positive it all has to go through Glock in Smyrna.