Here is the broadside version of the Haitian Declaration of Independence. This one is also held at The National Archives of the United Kingdom and the call number is either MFQ 184 or MFQ1/184 (the catalog lists the first call number but their ordering system won’t accept it without the additional 1/). The document was removed from the Admiralty records and cataloged as a map. It is cataloged “government documents 1804.”
Rear-Admiral John Thomas Duckworth of the Jamaica station acquired the document on his patrols around and to Haiti. He then sent the document back to London.