There are no good aftermarket intakes for the NPI motors. krackstang said it best though, good excuse to do a PI swap. If you don't feel like going all the way into it, Livernios makes a kit that will allow you to bolt up the PI intake manifold to your NPI motor. Do the intake and a set of factory PI cams, or even better some aftermarket NPI cams. That would be a good setup for a daily driver, if you were to swap the heads it would bump up your compression needing you to run premium all the time.
03 Mach 1: New toy 00 Kenne Bell GT vert: Sold 04 Sonic Blue GT: Missed 96 GT: First. Sold. 06 F250 6.0L 4x4: Studded, EGR delete, IDP tunes, 5" Straight pipe, S&B CAI