Meant to post this earlier:
Assuming that the speakers are dead (which they probably are), an Alpine SPS-610C is the closest thing to a drop-in replacement as you're going to get.
You'll need the adapters that Scosche makes for the bass speakers (speakers will NOT fit without them), and a little modification is needed:
- remove low-pass filters from bass speakers
- throw high-pass filters for tweeters in the garbage
- disassemble tweeters from their mounts, and glue into original mounts. Minor grinding of the factory mount is necessary, and urethane (windshield glue) works best to install the new speakers.
For $130/pair, it's money well spent.
Go hit Crutchfield, plug in your car, and find the speakers. They'll throw in the extras, no extra $$.