During my PhD I worked with Puruhá / Puruwa designers that I will forever be grateful to. Below I have included the work of two designers, and a text by a Puruhá scholar who also supported my reserach.
Sumak Churay by Sisa Morocho
Sisa Morocho is the designer and entrepreneur behind Sumak Churay, a popular Puruhá brand that has two stores in Ecuador, one in Quito and one in Riobamba. She is currently looking to expand to Guayaquil but also fulfils international orders for those interested. Find Sumak Churay on Facebook (main page and Guayaquil page) and Instagram:

VISPU: Elegancia con Identidad by Franklin Janeta
Franklin Janeta is the designer and entrepreneur who founded VISPU, a popular Puruhá brand located in Riobamba, Ecuador. Find VISPU on Facebook and Instagram.

Janeta Janeta, Pedro 2015 Cosmovisión y Sabiduría Puruwa. Published by Author. Riobamba, Ecuador.
A comprehensive book on the worldview and wisdom of the Puruhá people. Covers a wealth of information and is clearly written (in Spanish).
Below is an interview with the author: