If any of you guys are interested in a group buy on a timing belt parts for the RS6, I can put together a kit of OEM parts for $385.00. This will include all parts necessary to do the belt, idlers, tensioners and water pump. Here's a list of what each kit will include:
077 109 479D Tensioner dampener
077 109 485E Tensioner lever
078 109 119J Timing belt
077 109 244E Timing belt roller
077 109 244C Timing belt roller x2
077 121 113D Thermostat and O-ring
077 121 004P Water pump and gasket
This is cheaper than you could source the parts on Ebay, from someone you know. I'm hoping to get 5-10 people on board, for this price you could pick up a kit and throw it on the shelf. If you have an RS6, you're going to need this sooner or later.