it's a problem with no solution others will like.
Best hope is probably split AFC into two; an east and a west, including NZ in east. and have OFC island nations as a sub confederation where they do prelim tournament to find 1 or two nations to join in for WC qualifying, similar to what concacaf do with the carribean
Plus Guyana and Suriname which are actually physically part of South America.
Though socially and economically they are far aligned to the Caribbean.