you might be able to get the bolt by the head size. it's a 22 mm socket. if you find one, you might want to add some lock thread. small tube you can get at any auto parts store. runs about $3-5$. drip on threads prior to install. then torque to specs. hope this is helpful.
i replaced both belts, checkd the timing marks, got fuel, spark, checked timing @ flywheel, ccheckd dist, still won't start. does this have an onboard pc i don't know about? please help.