I use a Grundfos 15-18 FS pump for hot water circulation. While the water to the house was turned off the pump kept running and I believe ruined the pump parts inside. I want to find/buy repair parts new or used. Any idea where to find them?

Faucets, Toilets, Bathtubs, Bathroom Vanities from Kohler, Moen, Delta Faucets at PlumberSurplus.com (http://www.plumbersurplus.com/)

I'd start here.