Replacing Factory amp

Does anyone know of an aftermarket amp that can replace the factory infinity amp? Drainage plugs in rocker panel plugged and the interior flooded, ruining the amp. Lookin for plug and play or little modifaction.

You must have a diff year than me. I have a 95 lxi and it is under the rear deck lid. I tried to toss in my own system using the factory wiring. It did not go well. I didn't spend a whole lot of time on it but I would think it is beast of it's own.