Dealer just charged me $400 to change a bulb, what are my options...

[rmani]

I never go to the dealer, but I had an emergency as my headlight burned out at night and I had to stop by to ask them to fix it. Little did I know what I was walking in to. They charged me $400 to change my passenger side headlight, and now I'm out not only a bunch of money, but the two headlights look different colors. The older headlight looks a lot more purpleish, which I'm guessing is just because the bulb is old, but do I have any recourse? Just how badly did I get ripped off? Where can I get a new bulb to replace the driver's side so the beams at least match again.

Thanks