I don't know if I am imagining this or not, but I believe that QRS made
some sturdy rolls a few years ago.  They were made of Tyvek or something
like it.  They were a little expensive and I would bet that they didn't
sell well.  They probably have them all left as they don't deteriorate
or burn very well.  They might be a little abrasive on the tracker bar.

Spencer Chase