If you've already emailed the CGC and haven't received a response, it's a good idea to retry your request or try another contact method such as phone or live chat on their website. When you receive conflicting responses in the CGC Facebook group, it may be helpful to contact the CGC official directly or search their official website or forum for information. I also went through this process when I submitted personal narrative essays for signing, using https://edubirdie.com/examples/personal-narrative-essays/ for this. Regarding window film, it is recommended that you check this directly with CGC, providing details of your situation and book, in order to get an accurate answer and avoid unnecessary costs or wastage of material.