My suggestion is to visit the Used Building Materials Association website at:
They have a links section that lists various organizations involved in the reuse of building materials. Unfortunately, these links are not organized with respect to geographical location and it is not always possible to tell where an organization is located based on its name. You may want to therefore contact UBMA for further help in locating an organization that is active where you are.
Another resource to consult would be ReDo (Reuse Development Organization) - their focus is not exclusively on the reuse of building materials but they may also be able to help you with your question. Their web address is:
Roger M. Guttentag