Hi Taz, yes, I mean the head unit. On the Cougar I believe it's entirely
self contained in one big brick. Which simplifies replacement. I doubt
if any of the outside wiring is damaged, barring someone rooting around
back there and yanking on the wrong thing.

The Cougar has an odd size head unit. Adapters are available.
(Crutchfield.com part #120995803) They also have wiring adapters to go
with the wiring harness. Their prices on audio are very high, but
they're good for browsing.

I haven't actually seen the speakers in my Cougar, if they are the
same as the ones in my Contour, then they are also hideous. If they
were any cheaper they'd say Mattel. Paper cones in a plastic cage -
ugh. If you were only losing one corner, say front left or front rear,
I'd suspect the speaker but if you're losing the entire side I'm
inclined to suspect the amp section.