Seeing that you’re in New Zealand, there might be other options in your area.
Typically though, carbide tipped saw blades such as for circular saws are not manufactured with arbors that git angle grinders.
There are odd exceptions, but I suspect part of it is tool manufacturers trying yo avoid lawsuits when a blade kicks back and takes a chink out of the flesh of someone using the angle grinder with the toothed blade.
The lawsuit issue is known to be a major problem in the US, but sometimes less so in other countries.
As for blades that will fit on an angle grinder.
Arbortech is an Australian company that manufactured cutting blades that will fit on an angle grinder.
https://www.arbortechtools.com/us/?gclid=EAIaIQobChMI26K_t72E8AIVkeDICh2KyQO3EAAYASAAEgIHGvD_BwE
They also manufacture one or more types of blade guards to keep the angle grinder safe while using the blades.
The original Arbortech blades were made for carving wood, had a one piece steel design that could be sharpened, and later a blade with carbide inserts that could be replaced.
The blade Arbortech makes for aluminum is called the “Trade Blade” or “Tuffcut”.
https://www.arbortechtools.com/us/trade-blade/
Supposedly the blades are able to be resharpened.
It looks like the blades cost about $95 Australian dollars.
As for the recommendation for Kett blades.
Those come in a few sizes, and are HSS blades available with different numbers of teeth for different materials.
The blades are made for Kett’s saws, which are basically a drill type motor with a saw attachment similar to most Kett shears.
I suspect the tooth design on these may be safer for free hand use.
