As an alternative, I got a 1.5' one off of Ebay for 10 bucks. Reception is noticeably less, but not a huge problem for me as all the radio stations I listen to have a strong enough signal (And 90% of the time I use my USB or phone streaming). It was cheap, so not a big deal to switch it back. I'll post a pic over the weekend maybe. Some people say it's too short, but I think it looks great. I'm sure you can find some slightly longer antennas too.
Search for something like "1.5 short stubby Volkswagen":
http://www.ebay.com/itm/1-5-Black-Sh...ts_Accessories