I searched for "hot mirror film" on alibaba and ebay with no luck. Only seller I found was selling such films meant for car windows. For that reason it was too thick and a bit expensive because too big. I got one but yeah, it's too thick. I figured I would find few Alibaba sellers for glasses makers who want to apply it to their shades or for car or office windows. Maybe I'm searching the wrong term? PS. I myself need to reflect 850nm. Needed for NIR camera, film and not glass as it has to be bendable.