Even if they are gluten free, they are still breads. One is better off getting out of habit of eating bread, rather than inventing costly 'substitutes'. Your lifestyle is now changed. Just try to accept it. It's probably better to ferment and boil some whole grains if you feel like consuming grain. But iwas better off when I stopped doing it. Inflammation, anti-nutrients, satiation... grain seem to trifle with all of it.
That's said, a good substitute for wheat flour is:
3 cups of Rice flour, 1 cup of potato (not corn) starch, 1/2 cup of tapioca starch + 1/2 tsp of Xantham Gum. Then you can make a quick bread or bread from it.
You can also search for Choco's fermented corn bread, it is very good.