OEM Mopar Aftermarket Parts

I just purchased a 2003 SXT Intrepid and wanted to sometime replace my spark plugs and wires with original Mopar OEM equipment. Does anyone have any ideas where I can buy aftermarket Mopar from a retail store (such as Autozone or Napa)?

Also, does any have any ideas on a decent oil filter to use in this engine? Mopar? (<$10)?

Thanks for your replies!