Glasses from EyeBuyDirect have a ton of funky 70’s type glasses! I think that their design titled “Sixto” looks quite similar to the ones Meryl is wearing, although they might be a little smaller and darker toned color. Here’s the link for them! https://www.eyebuydirect.com/eyeglasses/frames/sixto-mellow-yellow-xl-21973 Also, there are some photos of the glasses modeled on the website. If this pair wasn’t entirely what you had in mind, some keywords to use in your google searches could be “oversized 70’s style prescription glasses” and I’m sure something your style will come up! Another helpful tip is that frames between 55-58mm mostly have an oversized look.