Ouioui series out of stock forever?

Hey newbie here :P

I would like to have a rough ouioui from series 4 so bad because he looks like my cat (aka one eyed). I'm checking the website every week to see if it's back in stock, but it doesn't.

As all the series 1 to 5 are still on the website I thought they would surely re-release them one day, because otherwise why still showing them all online? But I'm starting to think they never will sell them again...