12 years ago (omg...) the only thing I had as a question bank was a text file of 400 questions. I did the finger calisthenics to bring it up to GIFT format and that bank lasted me all these time until this year when they significantly re-wrote the book. Up until now, all they did was edit the introduction, rewrite a few examples, renumber the ages, put a new picture on the cover only to charge the student for a "new" edition.
I was afraid that I would have to go through the same thing but this vendor has a few versions of the resource available. This time it is three clicks and five seconds per chapter. It certainly beats creative use of search/replace and about 40 hours of editing. I had so much spare time on my hands back then....