Just bought that 1988 toyota corolla sr5

So i ended up getting that toyota corolla SR5 from my friends grand parents that i made some threads about a few weeks ago. Just incase anyone remembers.

It's red on red. 155,000km (a little under 100,000miles), and besides the right side mirror missing it's totaly mint. The grandparents owned it since it was new and it's in amazing shape. It's automatic.

I got it for 1700 canadian which i think is an unbelievable deal considering the condition and low Km.

Anyways the radio is busted and i NEED music. I know this should go in the audio section, but it's specific to this model.

I can't find anywhere on the doors where you would mount the speakers, so where do i put speakers in this bad boy? I was showing a friend of mine who does car audio stuff and he said we might be able to fit the 6' rounds right under the back seats (right below them on the kick panel?), and then the 6x9's behind the back seat rests below the window.

Would below the seats work, anyone tried this? Where else can i put them? There wasn't enough room on the doors it didn't look like.

Thanks! I'm excited about my new car.