Remember him competing, he's a stunning creature, looked very powerful, and a huge amount of him. Don't know any of his progeny, have you tried the Zangersheide website?
Relatively new to the UK I gather....his 2006 offspring look rather lush and very powerful.Think his oldest offspring is 6 so none are really high up on the circuit yet
I've got a Zanger horse if thats any help...just if you wanted an example of the general type that come from there - he's a rather humble version however, but he's got a brand anyway.
I have a DVD from Zanger and their stallions are VERY nice. Some of their 'B' stallions are worth looking at (then theres A, AA and AAA!).