I read it on this page:
Stan Ivar told us that the real little house was on his ranch, dismantled, and waiting to be erected again. The city of Walnut Grove (Minnesota) is willing to display it on the Laura Ingalls Wilder museum site, but it is not yet possible because Ed Friendly still owns the rights of everything about the series, and his permission is needed.
This seemed to be written in 2005.
zunshine.com/littlehouse/tombstone.html