There is a youtube video that shows how to create a headwrap from a t-shirt. I actually did this with 3 t-shirts and found they were comfortable to wear to chemo infusions when I did not want to appear without hair.
Until you find other places, this may be a temporary solution to help you.
https://www.youtube.com/watch?v=tNOY4cS_k7A&list=PLw7i2kZbjD8fowTLgzb-8gSlQLd2tDvXA&index=2