Just wanted to know of ways other then chasing my birds around the aviary with a net to catch them
I have a bit of a problem catching my finches not because my aviary is too big, but rather I have a disability which prevents me from catching them. There just too dam fast

The reason for catching them is I'm 90% sure one of the Goulds is suffering from "air sac mites" he is making a tick tick ticking noise and also wiping his beak on the perches a lot. So if one has air sac mites all of the Goulds will most likely have them too unfortunately. So I called Dr Marshall Animal Hospital to see if I could get some S76 which I can, however they said they need to look over one of my birds to make sure. Which is fair enough.
So I have two choices, find a way to catch the suffering Gould and take him to the vet, or go with my 90% surety and find S76 somewhere online, in Australia preferably.
Any advice would be much appreciated
Cheers
~Steve