Thanks mate, I've been lucky enough to play the full range so it's nice to be able to help people out.
Yes, the Slowhands would be underpowered, and besides are not humbucker-like in tone - they're still very much a strat sound, just with a much fuller mid.
However, the Sinners are available for the middle and neck position, the site is somewhat out of date. They are wound at 15kΩ and should produce a tone close to what you're looking for, though as you say, a strat single coil can never sound like humbucker.