Hi DeShark,
"Say what???"
after 1x new one under warranty, I know the prices for this "speaker".
77200-11A $162.35/pcs spare part listprice in US, in Germany €249,00/pcs.....

.
And the second is doing even croak at 1/3 volume now, that not so funny.
That's the reason why I want to change the the speakers.
"You have to add a mount ring or something"
Yes, of course that's my plan.
I have to cut the 2 "speaker-ears" and mount it with a distance ring with self-adhesive rubber grommet.
So I can still use the original stock grill and chrome ring on the original fix points.
"I think the amp may be where the weakness lies."
I agree, the internal small amp isn't a sound machine.
Yes at my the polk speakers sounds better than the stock speakers.
And for the price of $35.00 per pair, these sound 10 times better than the stock

.
"The Polks magnets drop in no problem?"
Not really, it is possible but very narrowly. The right side is OK.
On the left side I have to relocate the cables and internal connectors, and maybe a little bit adapt with the "Dremel".
At the moment this project paused, because i have a injury on the left hand.
I think in January I can make a sample ring on the laser cutter to try the correct fit.
You can find a short look on the attached image, but the dimensions with subject to change.