Wiring Up a Power Amp and Sub Woofer, pre existing hot wires? Options

[Lexicon_Devil]

I'm in the process of taking my small, alpine power amp and sub box
and wiring it up to my Celica. My stock amp is already bypassed and
the car is pushing the six speakers from the head unit.

I'll be using the RCA outs of my head unit for the inputs on the amp.

My question is -

Are there any wires down there that are already "hot n ready" for the
amp? Or will I need to run new wiring? I need power and a ground.
I don't want to cut into my head unit. Want the amp and woofer to be
independent.

Thanks guys.

By the way, I already have the console tore apart. I'm just lookin' for
a possible tip. Haven't played with it since I installed the head unit in
2003.

[DEATH]

Make sure to use good wire made for an amplifier - cheaping out will effect sound quality/level. Also the only good ground I've found [and I've tried many spots back there] is the hatch/trunk release bracket right in the center of the back wall. Everything else back there seems to be a weak ground source or if too near the lights will give you feedback of a sort in the form of a whining noise [called alt whine usually].