Zahan,
To my knowledge, there are no "brain dump" files that I've seen made available. Some people brain dump formulae, some table 4.1 from the PMBOK. Others ITTOs. It's really up to you.
From a personal perspective: Any "braindump" is on-the clock. At the PearsonView when I took my exam last year, I was given a legal size laminated white piece of paper and a blunt, well-used dry-erase marker. So, the brain dump technique may not be as useful as you believe. I came in prepared for one and after being given the paper/marker, didn't bother.
Good luck!
Harry