Not sure this is any help, but some things which help me keep binge/purging under control:
I've identified what causes me to turn a meal into a binge, and what makes me want to purge, took some thinking but essentially for me it is 'crap' junk food and fatty stuff, so I avoid those foods.
If I'm tempted to binge I challenge myself to sit for 10mins before starting and think about how I'll feel afterwards. It started as 5 and soon I'll try 15 - a good percent of the time this actually stops a binge.
I try and start with something like rice/potatoes/vegetables - and often I can stop there and don't feel the need to purge.
Don't know if this will help you but for me it is a case of limping through the term until I can take stock at home, and this makes life more survivable for me atm!