I'm not anorexic, but I have cut weight on anorexic-tier diets to save time and still do, so I can offer some insight on this.
Stick to low calorie, high volume food like berries, melons, and cruciferous vegetables. If you look at the raw vegan community, you'll find a recurring theme of skinniness, which is clearly from their low-calorie high-volume diets. Avoid dietary fat like it's leprosy; learn to cook without oil, butter, or lard; stay away from meat, eggs, and dairy. Get into endurance sports like running or swimming. Don't drink your calories. Because you are a bulimic with binge-eating problems, I wouldn't recommend you try intermittent fasting, but it is an option.