Dudes can just wear it as a scarf. There's a lot of YouTube videos that show different styles for it. I'm not a good source because when I wore it while presenting male, people thought I was just a gay fashionista.
I got mine from here: https://www.palestine-shirts.com/ It's held up for years now.
Edit: https://kufiya.org/ These folks clam to be the only 100% Palestinian produced and original from the 60's... They seem to be more legit.