If you're wanting to replicate the NY 604, wouldn't it make sense to use the same brand of drivers & get as close a spec as possible?
Markbass use B&C drivers (though I believe they now have their own custom made drivers, possibly still by B&C?).
It would make more sense though to flog the NY604 & get a cab or two that has what you're looking for already (sound, decibels, looks, etc).