Audio question?

For you audio guys out there I have a question.
The radio head for my Duster doesn't work, no sweat, I have a portable bluetooth speaker that I pair up with my phone and it works ok.
It got me to thinking, is there such a thing as speakers that can be permanently mounted that could be powered from the car?
I know there is such a thing as a bluetooth amp, but I'm not sure if you have to have a head unit to power it or not. I would think something like that could power the speakers and have stereo quality sound.
Anyone have any kind of experience or knowledge of something like this?
I'm not real interested in cutting up the dash and I'm to tight to send the broke radio off to have it converted to A/M-F/M ect. Besides, I'm told the backlog is about 3-5 months.
Just looking for options.