Ah, ok. You could try the Neck humbucker in parallel. But i would suspect outer coil of Neck humbucker in parallel with inner coil of Bridge humbucker would be closest.
Since it sounds like you're going to be trying various coil combinations at first, I recommend you buy and use a set of Seymour Duncan Triple Shot pup mounting rings that gives you access to all four modes of each humbucker (in series, in parallel, inner coil, and outer coil).
https://www.seymourduncan.com/single...ct/triple-shot
Once you figure out which 5 pup combinations you want, you could remove them, switch back to normal pickup rings, and then wire up a 5 way superswitch to give you quicker, more ergonomic on-the-fly access to those 5 positions you decided on. I or a few other members here could help with the how-to on the wiring if you need it. Then the rings are available to you to do some experimentation on another guitar in your collection. Or, you could keep them installed if you don't mind the extra hand movements required to throw the two switches per pup on-the-fly.
The STK1 is still in production:
https://www.seymourduncan.com/single...ack-plus-strat