Do your sons script? Most interviews are pretty standard by field. I set up moc interviews with local companies in my field. You learn the pattern to the questions. Once you get the questions you can have scripted answers for most questions. If I can get to an interview I have always gotten the job.
Interviews can also be broken down into formulas for those who are strong in math. Most interview questions come from the application so I always ask for the application and bring it back so that I can study the questions.
It is also important to know going into the interview if you are going to disclose the aspergers. There are a lot of Aspi traits that make us better than average employees.
A skills portfolio can also help.
There is a great program in Florida but the medicaid autism waiver has a huge waiting list. my computer is not cooperating or I would give you more info. I will see what I can find when my computer isn't PMSing