I'm sure this has to exist, but I can't seem to find it. I currently have a connector that attcahes to the back of my stock stereo. There is a 30 pin adaptor that then allows for charging and playing music. The problem is..the connector does not fot with the case I am using. My question is..is there an adaptor that will turn one of these larger (fatter) 30 pin adaptors into on that is the same size as the Apple 30 pin so that it will fit with 3rd party cases?