I don't know where you live but if you live near a city with a large Indian population you might try this. Go to a clothing store - it may look like only women's kurtas, etc. are sold there. But in many of these stores there is a section where they sell turban cloth. They may get the right kind of fabric to you. And I have found that small retail shops in Indian neighborhoods will be able to direct you to the right store if they don't have it.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/sikh-youth/30288-how-tie-patka-turban-converted-sikh.html

Do not tell me where you live out here in the forum. If you want me to help you locate something, send me a private message.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=30288

With a different fabric you might be able to follow the Sikhnet video without any problems.