Hi there,
Airservices Australia now publishes all their charts (ERC High, ERC Low, PCA,TAC,VNC,VTC) for free online.
https://www.airservicesaustralia.com/aip/aip.asp?pg=60&vdate=02DEC2021&ver=1
They are all downloadable as pdfs.
What would be required to convert these maps into something that can be consumed by LittleNavmap? I see that the extra maps provided by the zip file are all remotely hosted content, with the zip file just contaning the dgml files which point to this content.
Cheers