You have a couple options...first, use the search function as there is a great write-up on how to do what you're after on your own...for the oxidation, you could use a buffing compound to bring back more luster, however, if it's too oxidized, one can find replacements on eBay. You cannot beat OEM quality for light output so I'd recommend, if you're wanting new ones, to buy the OEM versions and pull them apart using the DIY thread and create your masterpiece. You can buy both headlights for roughly $186 if you're after the 06-09 and slightly less when you're using the 03-05 versions.
What's your budget and mechanical skills...