Somebody offers the camera that you mentioned, and they will have the same style/spec model in 480TVL within the next couple weeks. If you don't require the glass piece to be vandal-proof, you can achieve resolutions of up to 520TVL while maintaining a price tag of under $200, AND having an outside-adjustable 4-9mm varifocal lens.
-Edited CR- This was too many refferals for you not to be related.