http://www.youtube.com/watch?feature=player_embedded&v=MJsizuCKq9k
There’s a good shot of the whistle at 3:06. Does anyone know what it is? I haven’t seen one before.
Sindt Bb?
Pancelticpiper has played with the Gettys. He might be able to tell you more about who is playing on that video. 
Skip Cleavinger has played with the Gettys. Skip’s played with many of the Nashville Christian Comtemporary performers.
Feadoggie
It does look just like Sindt’s design…
I think you are correct AvienMael. If it is not a Sindt, it is a perfect copy. Looks and sounds like mine.