Have you tried West Coast Shaving?However, you can't find any Yaqi badger brushes for sale in the US. The only places you can buy them are on Ebay and Aliexpress.
Wet Shaving Razors & Supplies
Shop top classic wet shave brands sourced from around the world. Shaving soaps, double edge safety razors, straight razors, shaving brushes and more.
www.westcoastshaving.com