+1 on the Nordstand Big Singles. However, I must say that the Big Singles will vary in sound depending on the woods of the bass. They really sound best on basses with ash, maple, or alder. I have heard the new Ibanez SR1200 series, most of which have mahogany and ovangkol, with the Big Singles and they somehow don't have that jazz bass sound, in my opinion.
EMG also makes single coil pickups in soapbar sizes. The good thing about the EMGs is that they are dead quiet! No noise!