I looked, like some of the others at Hancocks and found nothing so I hit Google. I found something they call Therma-Flec Heat Resistant Heavy Cotton Batting. I haven't checked any further but this is the first time I have seen anything besides insulbrite. It looks like the quilted fabric you can get by the yard and says it is heat resistant up to 360 degrees. At 16.00 a yard it better do something
.Here is the link for what I found at fabric.com
http://Therma-Flec Heat Resistant He...on Batting Tan
Maybe someone else on here has heard of it or used it and can tell us more.
Also found this-
http://www.beaconfabric.com/vindex.html?cat344.htm