https://kufiya.org/
There's an auto-queue and at the time of writing this there's like 3600 people in it (and an estimated like hour wait), so no guarantee of anything being in stock by the time you read this; but I figured I'd post this in case anyone was waiting on them to restock. 
guy who is pushing for Palestinian liberation because he wants to get a fucking keffiyeh I missed it AGAIN
I bet Israel goes out of their way to specifically block Hirbawi's exports too. Symbolic battle
If you've got an Instagram, follow their account and turn on post notifications. They usually make a post announcing a restock like the day before/day of. https://www.instagram.com/hirbawi/