My inside door handle [the part that opens the door]broke. I searched and couldnt find if the 04 sedans handles are interchangeable with the coupes or not?

 

I don't think that the sedan and coupe door handle finishers are interchangeable. You can actually get the part for any year sedan or coupe at conceptzperformance.com though. I know the earlier year coupes (03-04) the piece was made of painted plastic and the later years (05-07) it was made of aluminum. I am not sure about this so you should check before you order, but if the plastic and aluminum piece are interchangeable, you might just want to get the aluminum one so you don't have to worry about it breaking.