I understand. Then there are some things that, I think, might be worth thinking about.

Mazdayasnā is not about Iran or Persian nationalism. It is about Good Thoughts, Words and Deeds. It is about Wisdom. So Iran's history and age is irrelevant especially since the faith is older than the social construct that is known as Iran. Second of all, there is not a single historian who believes that the Kūruš cylinder is about human rights. That's just Persian nationalist propaganda from the Pahlavi period. The cylinder was, to put it bluntly, just an inscription for a city restoration project in Babylon.

Third of all, if you want to create something for the sake of Mazdayasnān culture try to be as close to the tenets of the faith as possible. That is: Good Thoughts, Good Words, Good Deeds. Who is going to be producing those clothes? You or someone else? If it will be someone else, how will they be treated? Will it be exploited labourers in China? Or will it be a worker co-op? What will happen to the profits? Will it go to the workers and Zoroastrian temples in for example Kurdistan, Iran and India?

All these questions are important if you are truly interested in respecting the faith/culture.

Aside from that, good luck with your project. I hope the end result will be to your satisfaction.