Bkp don't make a fender style wide range humbucker. They have quite a unique sound as they use copper, nickel, iron magnets.
If you wanted to go with a single coil type pickup, you could go for a Mississippi queen, a humbucker sized p90. Very versatile for rock, blues and jazz. If you want a humbucking pickup, that depends on the style of music you play. But I think a set of mules would be a good choice for a thinline type guitar.
If you are after a proper wide range pickup, there are a couple of people out there making them just like the old fender ones. (The creamery being one of them)