anyone where to get metallised film? i need 90% heat rejection or higher with some visibility 50%. 3m prestige pr50 56% heat rejection not enough, pr40 visibility 39% while heat rejection only 59% too dark and not enough heat blocked. does jestac carry the 3m classic silver p18 films? i saw a few on qoo10 60cm*152cm silver film $20 but not sure if the specs are real.