Valiant Parts

I used to ship those all the time, back when shipping was half way affordable. I'd fold cardboard over all the edges, tape them on good, wrap/tape the whole works in carpet padding, and then put it into a big strong cardboard box. Most of the time I could find a nice used box for free at an appliance store or bicycle shop. Never had one break in 30+years of doing it. Windshields are a different matter. They'll crack just looking them wrong. The back glass is tempered and actually pretty strong.