I've been heading towards this goal for a while now but couldn't quite give a few things up. Mostly tomato sauce/ketchup, Sweet and Sour sauce, etc. I now make my own sauces and freeze any excess and use it again. It's not been easy either because I don't eat alone and other people aren't willing to go as far as me and sometimes you are just somewhere and have to eat something from a shit factory. No big deal to me because 99 percent of the time I'm where I want to be with it. Mushrooms have been a big discovery because they tend to hold the consistency of a sauce without any additives. For some reason I wouldn't touch these up until a few years ago but I nutted up and started eating them.
No easy task. Good on you!