If I do the half doors I will make them. I already have an extra set of doors for doing it. A mig welder with gas shield is the best way to go, but you can easily do it with flux core wire, just plan on extra work to grind all the little splatter off. Post below is about as many different ways as possible. I really like the guy who took some muffler pipe bent it to the shape he wanted gut it in half and used that for the top (post 23). It is such a brilliant idea.
https://forum.ih8mud.com/40-55-series-tech/134061-hard-half-doors-faq.html
https://forum.ih8mud.com/40-55-series-tech/134061-hard-half-doors-faq.html