Here's the problem. I know you're not thinking of it this way, but you're asking people to hand over their jobs to you. They've struggled to build up their list of companies, spent a lot of time and work at it. Visualize any other small business. Suppose you want to start a dog grooming business. You know that the neighbor down the street has been successful at it. She may be willing to give you advice, but she's not going to hand over her customer list!
I'd suggest that you do an 'all dates' search of the forum, and just look for clues. I just checked, and saw several clues in the first of 72 pages of search results.