Lous Van Bergen from Race preperation in Pretoruis Steet might be able to help they were Aprillia agents when Kawasaki imported them, he helped me to source a caburator a couple of years ago, on theier advertising board there ia also the Aprillia brand logo still.
You can contact All Offroad in Meyerton 0163621734, Mike 0821231234, [email protected], there is also a guy on the forum from Namibia will check his forum name let you know. I have a mate near there if they dont ship.