Fibre flour may be worth considering...it isn't cheap but is the closest to normal flour I've found. It makes decent bread buns (i've tried a wide range of esoteric ingredients to make a keto bread and fibre flour is the best) pizza bases and crumbles. Can't say have tried pastry but i can see it working well...not ultra low carbs at 15g per 100 but lots less than normal flour. Unlike almond flour based snacks i do find it raised bs so i do need to take insulin with it. It comes in normal (good for brown bread, wholemeal stuff) and fine (cakes, pastry, white bread)