yea, looking at that site again, I see it says:
In dash stereo: 5 7/16" depth Size code E
Front speakers: Dash 4x6, Front door, 6 1/2"
Rear speakers: Rear door, 6 1/2"
Bad thing is, it says none match the size exactly. Looking at a video they had on there, it doesn't look TOO difficult to...