So... my 987.2 that I bought used has pretty much no options that don't make it go, stop or turn. I generally like that sort of option package but in this case there were more speakers I could have had

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I've found that there were door panels that had a second speaker grill. A few questions...
Does anyone know the part numbers or a source for the door panels that have the second speaker grill and mounting location? I've found some on EBAY... anything else? Are there other options for putting a second set up front?
Are the rear shock tower speaker locations different from a body panel perspective as well?
Can anyone get me the list of speaker locations and sizes? From my understanding it would be -
4x 4" - 2x in the doors (upper speaker) and 2x in the shock towers (rear)
2x 5.25" - doors with factory grill/bracket or 2x 6.5" - doors with speaker mounted to door frame directly
2x .75"-1.25" depending on mounting skills, packaging, etc for the dash corners.
I can't find info on the center dash speaker. 3"?