Heya~
I installed them (polk mm) in my BASE Z without the use of spacers.
I think I ended up drilling an extra hole in the black plastic adapter/bracket that was included with the speakers, but overall it was do-able without extra spacers. (without further modification to the speaker itself or the door)
Regardless of the speaker choice, I think the majority (?? maybe all) of the aftermarket ones would be better than the stock BASE audio speakers.
I don't have pictures of the component speakers in the door, but I do have one that I took when installing the tweeter.
BTW, I used a acrylic plate that I bought from Lowes and made an adapter for the tweeters. Just FYI.
---AB
Laters,