The original swim school is in Blackburn, and contact details are:
Babyswim Australia 23 Fuchsia St, Blackburn, 3130 ph: (03) 9877 3525.
Otherwise, she's had a 'coming soon' notice on her website for 3 years now!
Emma's Babyswim has no website, unfortunately. She's in Ringwood, so a bit closer to you than Boronia (Emma lives in Boronia, so that's why it comes up in Google searches), I think.
Speak to both Cookie (I'd speak to Cookie first, she's the one with the first hand research ) and Emma about what you'd be looking for in swim lessons if you couldn't get to either one of them.