kiwijunglist: maybe this. +- shave.
https://folders.co.nz/products/240v-line-mains-power-plug
No, the cover on those ones would just fall off if any part of it was removed. Those type of plugs are terrible at having the plastic cover pull off when you remove it once they age somewhat. Cutting into it would make it do that right away.
Really the correct solution would be to get a PDU with IEC plugs on it and then use IEC male to female cables, but I guess the OP didn't know of the spacing issue when buying this and the Chinese sellers sold it as an AU plug because they are close enough in their opinion.