Many people suggest using soldering irons.
This is NPDs kit. The screws with the cone shaped washers are for the bottom of the door panel where the carpet is. I'm not sure what the pop rivets are for- someone here will know.
https://www.npdlink.com/product/mounting-kit-door-panel/104260?backurl=search%2Fproducts%3Fsearch_terms%3Ddoor%2Bpanel%2Bfasteners%26top_parent%3D200001%26year%3D1969&year=1969
ACC Auto Custom Carpet gets the highest marks, mass backed. The Essex cut pile is thick, dense and plush and the top of their line. When last I checked it was 46% cheaper at Rock Auto.