Q&I hope one of you has an A: Australian formula vs. US formula

S, who just moved from the USA to OZ, writes:

"quick question (and you can send this out to anyone who might know the answer)... what is a formula that is similar to Enfamil that is sold in Australia... we're having some issues with the one she is on here... we're trying S-26... and Enfamil was the only one that didn't give her tummy problems... it's really going to be impossible to ship in... so any ideas?

Baby is 4.5 months old and weighs about 14lbs and is about 25 inches long..."

I have no idea. I'm hoping someone out there knows.

If not, is there anyone who knows what make Enfamil special/different, so that maybe S can piece it together with what she's got over there?

Thank you!