Lets face it, unless you are #1- a professional that uses firearms to make your living in some way- competitive shooter, security guard etc, , or #2- an idiot that shot his last round at a pop bottle in the back yard and is totally out of ammo, you don't actually "need" ammo or components. You should be able to substitute and take conservation measures and get through OK. If you have waited this long to panic you are way too late anyway, better buy some archery equipment.