The part is also available for $11.11 at the following website.
http:www.mowerpartpros.com
As long as the blade is the same size you should be able to find a univeral blade which if not available at Lowe's should be available at Home Depot. Otherwise you can contact a dealer who services Husqvarna Power Equipment in your area to see if they have the blade or could order it for you. Have you checked the Husqvarna website for the blade?