DA CarsonLogos is soon releasing a library of D.A. Carson sermons. These will include transcripts and audio/video, which are all fully searchable from within Logos.

The library is currently pre-pub, which means it can be preordered now for a reduced price. The price increases as it gets closer to release, so if you are interested then the sooner you order it the better.

Link: D.A. Carson Sermon Library.