Where can i buy a replacement head for my razor?

i need to replace the head of the razor because some of the metal chipped out and it cuts me every time i shave. the model number is ES4815. PANOSONIC. ....thanks in advance!|||I recently ordered heads for my Norelco online as I was too lazy to shop for them locally. I searched on Yahoo and found them immediately. The postman delivered them to my door and I didn't even have to drive to Walmart. By the time you pay for the gas searching for them you will have saved money ordering from the internet. Good luck.|||supermarket