I searched a retail site, and all the speakers that came out to be a fit for your car are the same as mine. You need 4 ohm speakers, I doubt you'll find many 2 ohm ones anyway. lol Now since your speakers are 6 X 9 's like mine I recomend getting Infinity brand speakers. The sound quality is amazing and the price isn't bad either. The ones I got were 6 by 9 Infinity reference series. A speaker change will really impact sound quality, the difference will BLOW YOUR MIND!
www.etronics.com is a good place to shop for car audio. Good luck I hope this helped.