If only there were easy answers to this. . .
What has worked for me in the past, no matter how hard it is, DON'T purge. If you binge, leave your house, call a friend, go out for coffee with people do what you have to make yourself cope with the guilt of binging and you will think twice next time yiu wanna binge if you eliminate purging as an option.
From there you have to cultivate a meal plan that will suit a weaning bulimic: several small snacks and meals a day. I would say eat 6-7 times spread out using whatever techniques you can to NOT purge, and then you work on your soothing techniques.
Things that wont make you feel bad about keeping food down like a walk or jog post meal and regular BMs so you don't feel like food is piling up in your tummy, so you def wanna incorporate fiber into your meal plan, and maybe even a probiotic like Align.
GL XO