Hey mate. These two are probably a good place to start. I think I have some spare sets of rear brake shoes in storage if you struggle with those.
https://basisnz.co.nz
https://classiccarparts.co.nz/?srsltid=AfmBOor8V_bR9rv6xwyVmqvVhHjp29qC7sVp2alyE_iyB-whOMtlJUTy