I get mine at
www.jbpet.com. I like the Fresh n Clean brand with Arm & Hammer in it. The pads comes in a bag of 50 for $18.99. It's more than what some of you posted but it's the cheapest I can find for the brand.
They carry Advance brand, 50 pack for $14.99
Baby Blessing - you are tooooooo adorable!