Backdrop mockup: https://www.behance.net/gallery/82442853/3D-Mockup-Backdrop-Free-Download
Roll Up mockup: https://www.freepik.com/free-psd/three-roll-ups-presentation_885356.htm#query=roll%20up%20mockup&from_query=roll%20up%20mokcup&position=8&from_view=search&track=sph