In Search of a 'Grease' Car

I'm currently designing the set for a school production of Grease. As a car plays a main role in the production I'm looking for any contacts that have either staged Grease previously or others who know of companies where a 'Grease' car/theatre car/display car can be hired from. I wouldn't really want to put a real working car on stage (especially being a school production) so a light weight frame or a car with removed parts would be great. Thanks in advance. Dave