Leaky Roof; Who repairs Duro-last in San Jose Area?

Apparently the company that put on our Duro-Last roof about 7 years ago is no longer doing business in the San Jose Area. The current sequence of storms shows leaks just in front of the fireplace (many of the drops fall on the hearth). Where/how to locate a roofer with experience with Duro-Last? I can be reached at [email protected].