They are running an August 5% off sale. A great price for the vent repair and protection you need. Get them while they are hot. Copy the link below into your browser.
http://www.homedepot.com/p/Critter-Quitter-Plumbing-Vent-Repair-Flashing-for-2-1-2-in-and-3-in-Lead-Flashing-1-1-2-in-Dia-and-2-in-Dia-Vent-CQSSM1/206442727