No Idea if you can get that in the UK. But it looks remarkably like a ski wax scraper with a couple of shapes cut into it. You can definitely get hold of them. Although you’d need to be a bit more careful than with the one you linked to.
sheesh guys!! I was thinking about just making one but I thought it would be easier to find one for like £5
You can just use the edge of a big file and it will do same job and for acrylic use a stanley blade just hold it virtully flat against the acrylic so it dont cut in.