HELP!!! I'm trying to install a Pioneer DIN radio in a 1994 Toyota Corolla for a friend and it won't fit all the way in. The depth of the dash where the radio goes is smaller than other cars. The existing radio is a JVC KS-RT 35 and it is actually a smaller radio in depth. Never seen that before. Can anyone tell me if DIN radios come in different sizes? Thanx!