Probably not. Somewhere along the line they changed the way the shelves attach to the cart. This appears to be an old picture. One side of the shelves attached into the handle through two little holes (on the handles themselves). You then flip two little safety brackets so that part of the shelf stays put. The other end of the shelves (now instead of slipping over that flip out plate..like the picture) has two rounded groves at the bottom where they slip over the frame of the main Kartmaster never "attaching" to the flip out plate.
Would it be returnable if it doesn't fit? My thinking is that I could modify it possibly although obviously it would then be unreturnable, but the KM might be modifiable.