Meursault, thanks for the help with the wine. It turned out that it only gave me three letters I didn't already have, so my progress continued to be slow until the start and end of the key phrase provided the breakthrough. Never heard the middle word used for it before though.
I have one match now, but it looks as if there's a new process required for each. I think an online cracker is going to be the only time-efficient method.
How Sabre's mind comes up with something like this is a far greater puzzle than the puzzle itself. After initial tetchiness I am now raising my virtual hat to the master.