So you just want neck/bridge in position 4 instead of neck/middle, with the other 4 positions standard? That's exactly how I'm planning to wire my own Strat. :)
I don't think there's any way of achieving it with an ordinary 5-way switch, but you can do it with a double-wafer "super" switch. That's the way the Mexican Fender Classic Player '50s Strat is wired. I don't think the diagram's listed on the Fender Support site, but they emailed me a pdf copy. I could send you a copy if you like.
The other option is to use a push-pull or mini-switch to "add" the neck (or bridge) pickup to whatever's selected on the normal 5-way. That gives 7 options, the usual 5 plus neck/bridge and all 3.