You are in luck!! I found a website with TONS of them available!
It's the only source I actually purchased and believe it is the only reason I passed. I have no affiliation with the company. They came out with a great product and it appears it has been updated. When I bought them last year, there were only four books.
Best of luck. I'd rather undergo a good waterboarding than take that thing again. I think that would be a more humane form of torture.