Has no one found a solution to this. Multiple people including my self had/have the same issue in the past 5 years, what is the solution? Did everyone get rid of the car or accept the fact that they have to sit in a puddle when it rains?
As I re-read this thread I see several single posts......and no one comes back with what resolved the issue. Notice the post count on those having a problem.....only one or two posts and then, nothing.
Using my own past experience, 98% of leak complaints are plugged or restricted sunroof drains and the last 2% are related to a windshield or back glass leak........on further thought, I'll modify that last 2% to include the roof mounted antenna base allowing water to track down the feed wire.
Beyond that, I don't think the forum has much to offer on this subject.