l am looking online to find the ''knob'' or ''button'' that goes over the accessory thingy in my 03 Saab 93.It is the thing that you plug accessorie items into or phone charger. It is missing the knob to cover it up when not in use. What is this cover called and where can order it?

you can purchase this ''thingy :) '' at your local Saab dealer. Just tell them exactly what you have written. It only costs a couple of dollars.

Do you mean the 'cigarette' lighter/accessory power plug? You should be able to get one at the the parts counter of your dealer or most likely cheaper at the Saab recycler below.