Door panel clips
 

So most of the door panel clips (those little white things) are broken off and my door panels barely stay on. Is there a place that sells these, or does anyone have some for sale? thanks

The infamous Mazda 'A' clips. Over time the sun and UV beating into the car vaporizes all the plasticizer and they turn to glass. You have two options, buy from Mazda, or modify the arrangement to use a different type, preferably the universal black delrin ones; they seem to be much more durable, and stay flexible, even in winter.

Try and find a local autobody paint supply shop. They tend to have a good selection of those automotive specific fasteners.