Please do not use anything like an E-Collar for her next appraisal it would only be a quick fix to ensure that she passed it which would enable you to take the litter that you are posting about from a dog that YOU know is aggressive and will continue to be aggressive after such an appraisal.
I would strongly urge you to set to work regarding those issues and only do her next appraisal until you feel confident enough that she may pass it next time without having to use such a barbaric contraption.
Using something like an E Collar, Prong Collar..etc in the short term to ensure that she passed this apprasial could possibly bring more problems in the long run - such as fear aggression.

I would really find another solution and forget breeding from her altogether.