Blast from the past.
I went looking around for a free SIM to port in and out and an old deal for Lyca was alive again when I clicked through. Maybe it never went away - who knows? Anyway, they are free with free delivery and should OK to activate without spending anything, so good for porting.
By all accounts Lyca are pretty average although they do have a $9 50GB first month deal that may suit some (same link)
Telstra network
Cheers, ordered 300