Found the first code on a generic code site just prior to purchasing. If you visit the site without an adblocker/script blocker then it has a popup inviting you to join their newsletter and if you enter in any address it immediately serves up the second code.
Personally I'm a bit skeptical of the products and the cost. I wouldn't be buying them if it wasn't for the discount, 30 day money back guarantee and the option to pay with Paypal which will reimburse me the cost of the return shipping should I decide I don't want to keep them during the trial.
Potentially you might get a further 3.5% off with Cashrewards, or 6% with Topcashback, however this code isn't listed on their sites so no guarantee.
Interested to hear how the earbuds stack up for anyone using these? They're a listed company on the ASX so always wondered if the products were worth the $$.