Does anyone know of any specific construction industry/building materials, employment web sites or head hunters?

Specifically, I am looking to make a career change and I want to become a vendor rep for a construction material/tool supplier or etc.

I have a minor history of remodeling and building experience, and a keen interest in green building technology, and a lot of sales experience. Now I want to marry them all together and work for a company like Certainteed, 3M, Johns Manville or etc. as a sales rep.

I am not getting any responses from  the normal resume distribution channels like monster and hotjobs.

Thanks,