Just came across this while browsing, nice way of doing it if the need ever arose or if anyone from across the water needed to do it without sticking a huge ugly yoke on the back of their bumper. Seems pretty simple.
http://www.versionr.com/brakesfog/index.shtml
Just noticed as well if you go into the pics part of that website the owners FTO has a RalliArt exhaust just like mine! Its the only other FTO I know of with that exhaust besides mine!