From the openlab website, there’s nothing obvious that indicates they sell these.
I tried sending them an email via their website, plus I called Murray and Dwayne, but ended up at voicemail. Neither have called me back yet.
LittleBird and LiveHouse Automation all list the ESP version of the OpenSprinkler, but not only is it out of stock, it’s excessively priced.
Any other tips on Aussie vendors?