You can get a Swiffer Duster Handle and refill kit for $2.49 from Drugstore.com. The item is on sale for $4.49, but Drugstore.com is also offering a $2 off instant coupon. Make sure to check the box right below the price to “clip” this ecoupon and have it applied to your order:
Also, once you head to checkout make sure to sign in to your Shoprunner account to get free shipping with Shoprunner. After you log in you may get a message saying you have items that are not eligible for Shoprunner shipping. Click on “Keep all items in the bag” and the shoprunner shipping will be applied.
Your checkout should look like this before you submit your order: