I'm thinking "no" to oatgerm - this is, in principal, a low carb, low fat diet, and eating oatgerm is basically the opposite of that!
In an emergancy, if I do run out of oatbran I'll follow the advice for coeliacs. I'll miss the galette/muffins/bread - but at least I know that it's a temporary blip and they'll be back.
I am more concerned about newcomers to the diet, who may have to go through several weeks without access to oatbran and the lovely things you can eat with it, and may never incorporate into their diets at all.
It's going to be tough for them.