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Here's a link for Marineland parts: http://www.marineland.com/products/c...on_eclipse.asp
Click on your hood size on the right, and then click on the circled number of the individual parts that you need. A new page will come up with the price and if it's in stock. You could see how much you'd need to spend to get all your missing parts.
Otherwise, you'd have to get another type of filter, lights, and a cover separately. Some hoods have a light built into them, and other types of lights sit over a glass top.
What type of lighting do you need? Is the Eclipse light adequate for your needs? If so, and the replacement parts aren't too expensive, I would rebuild the Eclipse hood. If you want to upgrade the light someday, you might want to think about getting another type of hood or lighting. I have read that you can't retrofit the Eclipse hoods for a lighting upgrade very easily.