I just checked...they still have the subcategory for Pro-CG, but as drew said, there is nothing there.
Remember though, Pro-CG, Pro-Pin balls are just ways of companies to sell what used to be defective products, at a higher price. In the past these balls were seconds or X-outs and sold at a significant discount. Then someone had the great marketing idea to call them Pro-CG, Pro-Pin so people can put "exotic" layouts on them and then they could sell them substantially higher (still less than full retail) than they could as a 2nd or X-Out.