oops never mind I found them
fender extensions
Those are HUGE, at over 8" wide and designed for full sized Ag tractors, they are going to take a lot of fab work to fit and look decent.
I have 3" rear wheel spacers on my 1025r and actually like the look of the machine with the tires sticking out now. But I also don't drive my tractor in muddy conditions and haven't had any issues with the tires throwing debris on the sides of the tractor.
I would almost think a "Universal" type fender extension used for the off road industry might be more suited to what you are trying to do.
Perhaps something like this one....
FREE SHIPPING! OEM Quality. Stock part replacement for vintage cars can be pricey due to low availability. Rugged Ridge Jeep Wrangler Fender Flare offers origin
www.extremeterrain.com
I selected this era of Jeep because the wheel openings are very round and my experience with the fender extensions is the malleable, so it should fit the 1025r better. When I searched "Jeep Fender extensions", I found over 20 pages of product at just this one website. But many of the later model units are molded to fit the specific model fenders, which wouldn't work for your needs.
Hope this helps.