I recently lost the gas cap to this lawnmower and I can't seem to find a replacement. It is my father's lawnmower and he has had it for over 20 years. We have checked a bunch of places, both in person and online (including Sears, Craftsman, and even eBay), but none of these places had replacement parts for something so old. I really want to get it replaced because it was my fault for losing a piece of one of dad's most prized pieces of equipment and because it would be a waste to replace the mower since everything still works fine.

My question is: Does anyone know a place where I might be able to find a replacement part for something this old or does anyone know of another model that would have gas caps to fit this model?

It's a common cap ,that's a tecumseh motor.
Should be easy to come by.

Part # 35355