Kona that made your faucet doesn't appear to be the Kona that's around today. Kona's website circa 2005 listed 3 models of faucets, one of which was Moda. Elkay has a Moda faucet line that looks fairly similar to your faucet. Coincidence? Maybe. Or maybe one was based off the other or the product line was taken over.
Google "Elkay LK7522" for pictures. Parts list is here
and has 3 different part numbers for aerators based on finish.
Good luck. And next time get a name brand that you recognize.