Funding Database
If you don't already know about ScanGrants, perhaps you should. It is "a public service listing of grants and other funding types to support health research, programs and scholarship" supported by Samaritan Health Services and maintained by Hope Leman, MLIS (who is also an invaluable and prolific contributor to H-Med-Sci-Tech).
Here are the listings for "history of science" grants.
Here are the listings for "history of science" grants.