I just checked the VW website and they charge $600 for the deflector and an additional $100 for the carrying bag!
Who cares? The wind deflector is standard equipment on US cars. If you bought a used Eos with the wind deflector missing, you'll just have to suffer or cough up the scratch to buy a new one.
FYI, most if not all the upscale foreign convertibles ALL have them. Before buying my '08 Eos, I had a '95 Mustang convertible. I looked everywhere for a wind deflector for it and the ones I did see were $500+. I think there's a little mystery in the air when a convertible goes by with a wind deflector up.
I won't argue either way about the look of one in the up position, but I will argue that there definitely is a quieter ride with the deflector up. Add the windows up and its almost like driving with an enclosed top except for the hint of air on the top of your head. Its very peaceful.
Now if you're one of these people who enjoy driving with a sub woofer cranked up, a deflector is NOT for you. I just hit 70 on my body odometer and I seldom exceed 70 on my Eos odometer. I like it peaceful, my Sirius radio tuned to either channel 5 or channel 4. For my money its the only way to go. My wife doesn't care for convertibles in general, but with the Eos and the wind deflector up, she enjoys it almost as much as I do.