For years I've seen reflective firewalls on streetrods and muscle cars that look to be acrylic mirrors. But I've searched and I've searched the internet to put it on our 38. I've only found acrylic mirrored sheets but not including the adhesive. Do you have to add any adhesives, or do they come with them? A sheet to fit my 38 Chevy must be at least 21" x 42". Any tips would be greatly appreciated. Thanks.