is that even possible?? can you even just replace the bumpers and side skirts? and if you can, where could i find them?? can someone pls give me some info or a link...thanks.  

what you need to do is get ur ass online and just search "audi parts" "audi s4 parts" "audi performance parts" etc and just go through the links and you'll find plenty of places that sell OEM s4 parts probably cheaper than the dealer.  Trust me, I've done it trying to find upgrades for my B5 S4.  DAMN i love the biturbo! Good luck!