None of the Ford or Mazda parts training includes actually looking up parts. Actually I take that back, one of the Mazda classes said that the best way to look up a part in the catalog was to enter the part number....
There is so much you have to know doing dealer parts that aren't in the catalog. Things that you just have to know. I have files on my work computer with notes for all sorts of things I and other parts people have stumbled upon over the years.
Also the Autozones of the world don't pay that great unless you are on the commercial or management side. Maybe minimum wage with a small commission. Where on the dealer side I am at 6 figures with my hourly and commission. When I do go to the Zone or OReillys for something I don't act condescending to them at all. I don't know their system as I never worked in a parts house, but just treat them like people. I do get annoyed at their commercial reps, mostly because they show up when I am super busy and want to talk about me stocking a bunch of their stuff.