I was wonder if there are any other year cavi's that interior, exterior or engine parts would match up perfectly to a 04.

Frankly all the 04 parts mods and kits are all a little pricey but I can get older year stuff at next to nothing prices. So if an older year would work then that would be great but it just seems like alot of thing got changed on the 04s but it could just be me.

03 cav is the same. anything before 03 will be different on the exterior of the car. Im not sure about the interior

You can use a lot of items back to 88. Fenders are a little different. Bumper covers will work as will doors. Interior- the dash will work but you must change the whole thing :-( the bolts up is the same but that is about it. Heat and A/C lines are in the same place. Seats and door panels are good to go. Good Luck.