"I Needed a 90398 replacement filter for my All Around Plus shop vac. I couldn't find this filter at any of the big retailers including Sears. The lowest online price I could find was ShopVac.com, where they're sold for $13 bucks each. Although their shipping charge of $10 dollars is excessive in my opinion, they had what I needed and delivered in less then a week. This outfit may gouge you in shipping charges, but they've got your filter and deliver. "