Hey, I get the hunt for reloaded ammo. I haven't tracked down the really oddball stuff myself, but I'd check local gun shops, people usually trade or sell rare rounds there
I've got a pile of various common pistol and rifle brass I could load up, but nothing too crazy like an 8mm Lebel. What are you actually looking for with that "odd ball" tag? Give us a list of calibers and maybe we can make a deal happen
Finding commercially remanufactured ammo is easy, buddy. Check up on Freedom Munitions, they sell that stuff all day long, even in bulk. But you are to beware of personal handloads, though