The Call List-Serv is offering the Western Samoa Law Reports, 1930-1949 and 1970-1979 (2 volumes) free for the cost of shipment. Some Samoan cases are available online, though the Index is also on PacificLii.
Samoan law is described in PacificLii.
I've not found any reference to any Canadian court having considered a Western Samoan case. But it does seem sad that the inexorable rise of web-based caselaw has put this obscure bit of antipodean jurisprudence in the recycling hopper. Unless someone wants to claim it from the BC Courthouse Library.