What flux bio cleaner for ultrasonic baths in Oz?

[Fleetz]

Any recommendations for a good bio clean product that can be added to distilled water for cleaning flux residue off PCBs in an ultrasonic bath here in Australia?

I have tried locating Branson EC here in Oz but doesn't look like its available. I am heading off to the US next week and probably could pick some up there but not too sure on if bringing this solution back is going to cause issues on both USA and Oz customs?

Anyway I really am looking for an ongoing Australian supply solution?

Any thoughts?