Norm, theres a tool kit depot (owned by bunnings) in Mentone. They have some pretty decent prices on GA spares Bynorm blades and filters.
$4.95 18in victa blades, 4.95 masport 18in blades, 6.95 19in victa, $5.95 briggs ohv kidney shaped filters
https://toolkitdepot.com.au/search-results-page?q=bynorm$99+ orders have free delivery so
Don't think theres a tkd in nsw though
