Dirt catcher for Vitara LY

Hello, has someone experience and possibly pictures of dirt catchers in the back for the Vitara LY ? My problem is that my Vitara in the back is always extremely dirty, I often have to drive on very dirty roads. There are many offers for example on Amazon or eBay from 30 – 60 euros, but also original Suzuki, for say and write 119 euros only in the back, without mounting. My question is, what is the fit accuracy, and must be drilled into the sheet metal? Who has ever installed such parts? ?