Carey Frisch said:
From your local courthouse. Nothing is legally-binding until
signed by a judge.
....
Adding to that, there may be necessary wording particular to the
jusrisdiction in question that varies from the wording in other
jusrisdictions. The local courthouse would still be the best place to start,
and such variations would explain why such templates might not be available
online (who'd want to keep a separate one for each US state plus D.C.,
England, Scotland, Wales and Northern Ireland, each Canadian province, each
Australian state and New Zealand, just to name possible jusrisdictions which
could require different wording in just the English-speaking common law
countries, and that also brings to mind the necessity of French language
equivalents in Canadian provinces).