Do Australians have playtex sport tampons?

No, you don't have Playtex Sport tampons in Australia. Just get another brand, all tampons work the same and absorbency is universal so they all hold the same amount of flow too. It's best to avoid rayon tampons like Playtex anyway, opt for cotton tampons like Cottons instead.

Unfortunately not, I've searched high and low for them... but you can get them from quite a few international sellers on Ebay!