Here is the fun part: Suppose they go to CTN; chances are strong that any member there will shy away from Mac Excel and say “You should speak to Chris Greaves”; my reputation there is that I do the awkward and difficult stuff.
It sounds like your expertise will be an asset, so I'd like to book you for a half day. Is that 4 hours? To avoid unnecessary costs, I'd like to meet in the common area of my building. It's set up for meetings and has internet access. Does this work for you? Also, is Friday morning an option? If not, tomorrow afternoon works well. I look forward to hearing from you.