An item that gives a pink ward effect around the player.

Okay so i get camped quite frequently and a lot of times (especially when i play mid) there's not much i can do about an incoming Yi,Hecarim or Olaf. I can't have a ward in every single bush at all times and it's really difficult to survive ganks from several champions, champions with amazing speed or stealth. In addition lately it's been much harder to prevent a gank with just a ward especially from champions who are really good at avoiding it or who just run towards you to fast anyway, or ones that will tower dive you every time. So what do we do?

I think it would be really awesome to make a sightstone like item that gives a small passive pink ward effect around the player, this way they don't have to rely entirely on carrying a pink ward with them just to stop stealthed opponents. And if it also gave the player the ability to look into a bush by walking near it instead of constantly having to ward it at all times if they are being camped.

Maybe someone else has a better idea which is kind of why i posted this so we could discuss what an item like those would be like and how it would work.