Amazon has the 4.5" Chemical Guys Hex-Logic Heavy Polishing Pad (BUFX_103_HEX4, Green) for $4.99 - 15% off with Subscribe & Save (can cancel anytime) = $4.24 with free shipping on $25+ or with Prime. Fits 4" backing plate. Currently is #1 best seller in body repair buffing and polishing pads on Amazon.