You can buy Iris using PayPal by clicking here:
Iris – PayPal
Alternatively, if your country is not listed or you do not have a PayPal account, you can use 2checkout which supports most of the countries:
Iris – 2checkout
If you are a cryptocurrency enthusiast or you just like buying things with cryptos you can use:
Iris – crypto
It supports Bitcoin and some of the popular altcoins.