Amazon has the 120-Count Boxiecat Scoop & Tie Cat Litter Clump & Poop Bags (Unscented) for $9.99 - 40% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 10% off with Subscribe & Save (can cancel at any time)= $4.99 with free shipping on $25+ or with Prime. 

These handle bags are large enough to fit to accommodate any cat litter scoop.