Just random lame opinion but entirely too much considering it's just a piece of Beech with what's probably a spray on finish. Anyone who's tried knows Beech is not easy to stain and get a finish like that. I also know Weihrauch doesn't make them because when I emailed asking about a small jar or can of finish to touch up a stock, I was told they don't do any of that in house and they don't carry any.
Reach out to Krale, I am sure they can get you one, they currently have HW 90 and other stocks at about Euro 88 , there would also be no issue on shipping from the Netherlands