mylar, where can i buy?

wondering if their are any local places i can buy it or even that sheet stuff cant remember what its called.

I had NO luck buying mylar locally

I've heard people using gift wrap....but I don't know about it's reflective qualities like mylar

I bought mine on eBay, shipped in less than a week after I bought it

my buddy went cheap he is using those emergency first aid blankets you know the silver ones.he got them at the dollar store. Peace

you can find gift wrap paper, its much cheaper too, and just as good. why not just paint flat white i do, its good, easy and cheap, everyones got an old tub of white paint laying around. havent they.
why not try that

or buy some flat white paint i believe it has about 60-70% reflection capabilities