Hello. I see cases all the time on Ebay. I dont know what Ebay is like in Greece. I myself am wanting to purchase some. I would be willing to help you if you need.
I have one like this on my FB #13. It is nice if you aren’t taking the box in and out of the plastic all of the time. It is more for display and protection. I say this because the flap can be easily bent and when you bend this type of plastic it is hard to get it back to being straight.