Well, pretty much you have to get them form Nissan..run about 50ish each..ABOUT..might be like 75 from courtesy. they bolt into the giant holes left behind by the BLOSE enclosure...tyhen you slap any 6.5 speaker in there. If youknow a goos stereo shop they might fabricate custom ones for you for around the same price..i made my own out of wood, not to hard. Replacing the Z stereo is easy..but VERY time consuming due to having to run all new wiring.