Haven't ordered from them, but first hit from google.. http://www.easybuiltmodels.com/parts.htm#silkspan
I have not needed to order silkspan since I had enough on hand to cover a few boats. The source being cited is out of Alabama. It is model airplane quality and I have read that it is good stuff. MMJR
I *think* got my silkspan from easybuilt ........ I will have to check. Wherever I got it from, it worked good for me, based on my zero experience.