Non Standard Vacuum Breaker

[Kub]

I have a outdoor spigot that has a vacuum breaker on it. I bought hte house 3 years ago and it was built 7 years ago. It appears the vacuum breaker on the spigot has gone bad. Water is spraying out of the middle portion of it and there seems to be no way to get in to the attachment to fix or replace the seal so I unscrewed it and took it to the local Lowes and Home Depot to look for a replacement. After searching there and a few local hardware stores it seems I have some wierd non standard spigot/vacuum breaker. The spigot side of the vacuum breaker seems to be 1" (or close to it) but the threads that screw on to the spigot are fine and close together. Not the standard pipe size threads. Of course no one seems to have these and I have no idea where to look for the replacement. I did some searching on the web and all the ones I have found online seem to have the standard pipe threads on the spigot side. So does anyone know what make/model spigot I have been cursed with? I am even willing to just get an adapter (non vacuum breaker attachment) just so I can hook my hose back up and use it. However, the non standard threads on the spigot seem to be messing that up too.