Will have to check out bunnings for that no-see-um equivalent. Sounds like a winner to me.
Just a quick update; the ripstop I got from my local spotlight. It came in at approximately 72gsm. It's not the lightest stuff but it'll do until I can source some 38gsm ripstop at a reasonable price.
If you go alright with that stuff from rope galore i might grab a length myself.