depending if you have the charcoal filter or not, your car have either 2 or 3 filters for the A/C.
1 is under the passenger dash. Very cheap and very easy to replace. Its above the passenger foot.
1 is the Charcoal pre-filter. Its located right before the blower motor and its location is how I explained earlier.
The last one if oyu have, is located in the middle of the firewall where wiper needs to be removed.
Its hard to give you part numbers because if you have Charcoal filter, the pre-filter will be different to the ones where Charcoal filter does not exist. Check if you have charcoal filter first.
I think all filters are available at fastlane