Fender did a Strat/ Pickup for Jerry Donahue in association with Duncan. They knocked two of the plys out of the pickguard under the bridge pickup and fitted the metal plate in, and then made a slightly fatter, flatter single coil to fit in. To the best of my recollection, it was sited a couple of mm more toward the neck, and was slightly less tilted...
There was an article about in Guitarist, but it was about ten years ago, right enough...
