Here is the homepage of a rebuilder, they charge $300.00 for a complete rebuild plus $30.00 for shipping if memory serves me right. Turnaround time is 3 days.

http://www.cvjreman.com/MercedesBenz.shtml

In case you decide to get the car back to its original state. I belive that 2365mm belt is available from FastLane as well. I did buy one form Napa but it didn't look like an exact match, the groves seemed to be slightly fatter and the width was slighly narrower.
I didn't install it though it turned out to be the alternator bearing.

Alex