One other product that is designed for headlight resortration but in this instance is in theory harder wearing since it's 2K is:
www.spraymax.com
Not sure of the above spray can's availability via physical store down under (but one could check paint suppliers).
Otherwise specific headlight restoration clear coat that does sell down under (but sold in bulk) is:
Buy our Advanced Polycarbonate Protective Clear Coat which will Restore up to 12 vehicles and last as long as new replacement headlights.,
oemheadlightrestore.com.au
Choose your poison, 2K or 1K...