neck CS doesn't sound at all like a neck NB, and they're both A5, so maybe the "overwound CS" thing applies just to the bridge unit...
anyway if you don't want a neck NB (why on earth??), you could try a PK (ceramic, my favourite neck pickup for leads) or a neck MM, that's very versatile for cleans (i heard many say the exact opposite but i love my neck MM!)
my only basswood ibanez (an RGR) has got a couple of A5 warpigs but it flattens and darkens their tone a bit, compared with my other A5 equipped guitar, a mahogany epi LP... so maybe the PK should be the best option if coupled with a C-NB. not considering a neck NB, obviously...