A friend reminded me of two colleagues who have conducted preaching workshops (or similar) and who may have materials available for sharing.
The one, Andrew Page, whose excellent sessions can be heard here on the website of the European leadership forum.
The other, Mark Troughton from York Evangelical Church, who ministered for some years at Lausanne, then Martigny.
The cogs turned slowly. Aha ! Yes, before we came to France Mark sent me a CD with his material adapted from "The Divine Relay". You can read about his work here.
But we've moved house twice since then. And CDs are such elusive, timid things. They must be hunted with care.
So hunt I did. And I found the CD.