You should check out www.grants.gov
Usually there is something that would fit the "really good non-profit loot" description, and in your case, it would probably fall under arts or promotion of the humanities.
As long as the group overseeing the restoration has a 501(c)3 status, they should be eligible for most, if not all, of the grants listed.
You have to check the site every day, as a number of the grants appear and disappear quite quickly.