This isn't exactly what you requested but it might help:Hi,
I need a spare part catalog with the factory numbers for a 2000 chevy malibu which I can download from the web, Could you pliz help?
If you have the GM Part number you can search, but unless i missed something the site will not give you the GM Part number if that is what you are looking for. Lets say you want the GM part number for master cylinder. You can order the MC, but site does not disclose the GM Part number. Once you have the GM digit you can search the 'net for the best price.You can also try www.gmpartsclub.com Just click on malibu parts and you will be able to search by part numbers.
Got to the checkout point, but when i had to fill in account information i stopped. Guess you have to have an account to get the GM part number during the checkout.I know on www.gmpartsclub.com if you find the part you want and add it to your bag, then hit checkout it will lists the part number. If you write this part # down you can search the prices on several different sites.