New South Performance sells their VW color matched boost gauge, steering column pod, and all wiring and tubing for $100. You really can't beat that for something that looks factory. I'm very satisfied with mine.
I have the stewart warner perfect match gauge and pod.
Pics as fitted in my car. Note that it is in metric bars. Comes with everything (including the LED controller where you can hook up an additional 3 LEDs) but no boost line, you'll have to get that from a hardware store.