I have not looked for the motor for the recirculation door, but I have done the blend door which is below the radio. See below.
If you take the glove box out you may be able to see the motor, 2 screws hold it in and it just pulls out. I had a stripped gear on mine and just moved the bad part out of position.
Check in the 4th generation section of this forum and go to "Heating and Cooling", you may find some more info here.