recommended sub to fit stnd. cab Nissan trk.

Systems

I own a 93' Nissan 4x4 standard cab truck. Currently the only speakers installed is the 3065 components. Midwoofers located in the doors. Tweeters located in front windshield door frames. I wish to add a subwoofer not only to add more bass but to also prevent overpowering the 3065's and possibly damaging them. I am using only one amplifier, 2 channel Sony XM1002XS. Which is rated for 100 watts RMS per. channel @ 4 ohms and 230 watts max per. channel @ 4 ohms. I am looking for a small subwoofer/s that must fit behind the bench seat and installed as a tri-way setup. I do not have room for anything bigger then an 8 inch sub and do not want to make major modifications to the cab to fit anything bigger. Anyone have any suggestions or recommendations that doesn't involve replacing the truck or cutting away the rear of the cab.

wodom1

check out the crutchfield.com website and click on the car audio and video link. go down to custom-fit boxes and see if they have one for your truck. they're all made by q-logic, so they're good, and they might have one for your model truck.