I stuck a set of SD Seth Lover pups in my SG, it gets a convincing imitation of the Live/Dead tone through the SMS Classic along with Brad's Earth Drive pedal. Next on my list: play 8 hours a day like Jerry. The tone is uncanny, especially when the amp is good and hot. It can get pretty nasty (in a good way).
The story I've heard is that Seymour Duncan purchased the original PAF winding machine from Kalamazoo, and that they use the original machine on all the Seth Lover pickups they produce. I don't really know if it's that or if it's just a good quality, well-designed pup, but however it's made it sounds close if not identical to me.