You'll be doing very well to find a gasket set... these are a clamshell so the bottom is one moulded plastic piece & everything above the crank & bearings is the cylinder. Assemble with fuel rated sealant & be sure to vac & pressure test (I've done several that just didn't want to seal in the past). The 40-50 cc husky & jonsered saws of that lineage share a lot of common parts & have interchangeable cylinders etc