I think what you're looking at there is 3D printed parts with magnets glued in them, I'm sure I've seen these before on ebay and it's something made by an individual who sells them on ebay rather than an official product, if you're into 3D printing you might be able to find the designs online somewhere?
I don't think SHAHE has anything to do with it other than that's the brand of scale used by the seller.