Performance what a few frames, some even with forks, in your price range.

http://www.performancebike.com/bikes..._400001_400314

Colorado Cyclist has a few frames at a little over your price including a LiteSpeed and Eddy Merckx. Well the Eddy Merckx is more than a little over your price range.

Are you going to do the work yourself? If not you'll have to add a lot more money. Don't forget wheels!

Unless you have a spare set of wheels and a lot of the other parts, it's often cheaper, quicker, and less frustrating to buy a complete bike.