Kingdom of Knuffel

OK, returning user here, a bit lost regarding some items. So bear with me and a question that might seem silly.

I got the Lost Mailim Hair (Gold) thanks to a pop-up thingy which told me where to find it.
I saw an announcement about this, but I think it had no names nor pics of the items themselves. (Or at least I can't recall them.)

Now I found in the market some Lost Bunny Headribbon, Lost Seashells, etc.
Is it safe to assume that all the "Lost something" items were to be found in the same way and therefore not avaliable in shops anymore?

I thought so, thank you very much for confirming it!

So I'll probably try to grab those that I can, and maybe I'll wishlist the rest in the future.
Oh, so much work to do!

Here is the link to the original post.
New Feature: Find free items!

Thanks, Opalnyx.
I had seen the announcement, but there is no pic or names for those items. I was not sure whether the "Lost Whatever" refered to them or to some other set of items.