air conditioner filter change on 2003 Lexus LS430

How do I change the air conditioning filter? What should the part cost and can I purchase it at Autozone or Oreilly's?

Asked by for the 2003 Lexus LS430
2 answers
http://www.youtube.com/watch?v=5OeYp6EBTtg
the filter is located behind the lower glove box and is simple to replace. I ordered my replacement filter online for $30.