I checked and couldn't find them. But I'd say the same thing the others are saying, some rubber tubing from any hardware or automotive store should be easily made to work.
RS6 #1, 01E, 2.5" straight pipes, AMD Stage 1 6MT tune, 460awhp/530awtq on AMD's Mustang dyno. TOTALLED.. RS6 #2, Ebony Black Pearl on black/silver combination with carbon, up and running with 6 gears and AMD tune.