This is the cylinder base gasket.

http://www.edgeandengine.com/store/dol-965517131.html

The original engine was a Dolmar PS-120Si. The Cylinder and piston assembly and carb are used.

You can use Yamabond for a liquid gasket on the case seams.

May have to make some of the other gaskets. I things like magazine covers, card board, or gasket material from the auto parts.