The search for funds for starting a museum archives program could start with the National Historic Publications and Records Commission (NHPRC). It has been several years since I was in touch with them, but I sometimes see their contact information in Aviso. I have also been among the beneficiaries of money from companies that appear extensively in the archives. Does your museum have a Kress collection? If so, your people already have the address and a contact for the Kress Foundation, and if not, I would not expect their support. You need a special type of funder for this type of project. I have been told by several development officers that this is a hard sell, which I believe, but sources are out there.