Here's the Dragon 1/72 kit at Squadron:
http://www.squadron.com/ItemDetails.asp?item=DR5001
As I recall, a couple of squadrons were indeed formed, and it's rumored that a number of missions were flown against Allied bombers. There are no confirmed kills recorded due to the insane confusion during the last month of the war in Europe, and no one really knows if they even fired a shot in anger.
The plane was NOT easy to fly, so it's original intent - stick some partially trained Hitler Youth in them to supplement the Luftwaffe regulars - was just impossible.