http://www.dubmodder.com/
After MONTHS of development, DUBMODDER is finally ready for the public. DUBMODDER is an online tool that VW enthusiasts can utilize to create the MKIV of their dreams. You can choose from popular brands of aftermarket VW aesthetics like Oettinger, Rieger, Caractere, and such. You can then change your headlights, slap a new set of wheels on your car and lower it to your liking. It allows you to basically create the complete look you're going for before spending your money. You'll be able to visualize your MKIV the exact way you want it. Think of this as the "TireRack" wheel selector, but better

When you're done Dubmodding your Volkswagen, DUBMODDER allows you to print out a Summary of the parts you chose for your car. And if that's not enough, the best part of DUBMODDER is that it takes all the guesswork out of finding the parts you need. No more useless threads on vortex like "Can I see a pic of a black Jetta with BBS CH's?" or "Who sells Rieger bumpers?". Instead of posting, you can refer to DUBMODDER to take you directly to the website of a qualified vendor who sells the product(s) you're searching for. Simply roll over the products you've selected on your car and click that product to launch the vendor's website.