I think your best bet is to compare the parts catalogs on http://www.maxumcustomercare.com/
They have both the 99 and 03 listed there. You may also need to cross reference the old part numbers in the 99 catalog as they updated all part numbers in 02 to a new system.
So look up a part in 99 catalog, check cross refeference list and then compare to 03 catalog.
My guess is they are not the same but it is only a guess.