Here are a couple of threads. Are one of these perhaps the one you were thinking of?
http://www.a5oc.com/forums/showthread.php/installed-rs4-flat-2167/index.html?t=2167
http://www.a5oc.com/forums/showthread.php/swap-s5-steering-255/index.html?t=255
http://www.a5oc.com/forums/showthread.php/installed-rs4-flat-2167/index.html?t=2167
http://www.a5oc.com/forums/showthread.php/swap-s5-steering-255/index.html?t=255