Alex -- You might find this thread to be of interest. I too would love to see Puritan funeral sermons republished:
Puritan Funeral Sermons
That funeral sermon for Abraham Janeway was, I think, appended to the 1667 edition of Thomas Vincent's
God's Terrible Voice in the City, but not included, I believe, in the 19th century editions. The SDG edition is based on an 1831 edition rather than the 1667 first edition.
God's Terrible Voice in the City ... - Google Book Search