Where do you find the "Long Beast Ears"

Y'know, those ears that are very similar to Twitching fox ears but look very long and sharp instead? I cant find them on the Personal shop, because for some stupid reason it does not find it, where do you look for them?

They were a Fresh Finds item back in the day and are no longer obtainable. We can only hope that they'll be revived in the future, somehow.