I went looking for the deal on an MSR foil windscreen– the heavy duty stuff. I discovered that Brunton makes a simlar item and found it on eBay for $6 and $2.75 shipping. There is enough foil for a couple rigs— it measures 29" x 6" and weighs 2.3oz total. It does not come with a bottom section like the MSR.
I cut down a section to fit in my Snow Peak 700 (about 4"x 15") and that comes in at 0.9oz.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280505626057 is the seller I found.
