How fun these are to customize for your kits! I love using them myself but wanted to share them with you. I've included 3 curled filmstrips in both .png files and the .psd files that I use, and they're so easy to make in minutes. Just group your papers with the rectangular layers to fill in a section here or there, and use hue/saturation to change the color of the curled section while keeping the filmstrip black.
.png, .psd., & .tif files
No credit necessary ~ Enjoy!