After sending a few emails to glider pilots in Germany I have been able to secure a glider for the contest. I have an ASW-27 booked. This is actually a club-owned glider and it was arranged through Ulli Kremer at the Schleicher factory. From what I understand the club is associated with the factory and is in the Wasserkuppe area near Frankfurt.
This glider was flown by John Coutts in the Worlds in Sweden last year and posted the fastest speed of the contest in the 15 M class. The factory re-profiled the wings last year so it is ready to go.
The rental cost on the glider is 125 Euro per day, and this is a good price!
The glider is equipped with an LX7000 flight computer, so I will be familiar with the instruments - I think I will bring an altimeter in feet though because flying in meters is just too wierd.