parts

Hi
I have a MK1 Cabriolet that has an EZ engine in.
Does anyone know how I can find out the age of the engine or where I can get parts for it, please?
I need the main metal pipe and the rubber one that is a different size at each end and has a slight bend in it, it is a water pipe.
Any suggestions please
Sue

Does it run from the water pump to the heater matrix?