Need some help with parts identification

G'day from OZ Adam. Glad you could join us. There's folks here who will be able to give you far better advice than me, but can I suggest that you contact Cox International http://coxengines.ca/
or Ex Model Engines http://www.exmodelengines.com/
They should be able to help with a suitable cylinder/piston. Have a close look at the cylinder and see if there is a number stamped on it. It will be either below an exhaust port or on the flat section on the inside of an exhaust port, right hand side generally. Most car engines I believe only had a single by-pass port in the cylinder and did not have sub piston induction because they used a muffler. A good look inside the cylinder should tell you if it's single port and if you look into the exhaust port while held up to the light while turning it past top dead centre you should not see any light below the piston skirt. This is all assuming it has its original engine or cylinder. Finding out the exact engine configuration for this particular model may prove difficult, but if anyone can help, the folk on this forum should be your best shot.

Cheers.
Rod.