They come in the repair kit precoated with sealant.
They are not standard bolts they are deformed shank vibration proof bolts made on special order for the carb makers.
A big specialist fastemer shop may keep them or can get them but no one is going to bother wasteing time listing a 5¢ screw
Good chance if yu can buy them they will only come in a bag of 50 because the cost of invoicing will be greater then the gross profit.