Nothing really does what you guys are asking for, this I know. Your best approach is setting up designated accounts for the demo you need, and putting in the time manually or hiring a va to document the specificads you are looking for. This is actually very effective dont right it off, thats why my actual facebook says im a 45 year old woman lol im a 25 year old man just for clarity.
Otherwise i know a little solution from my own endeavors but its not completely perfected, id have to do a few runs to get it back in my head. Ive done it plenty myself but I dont think its technically compliant practice with regards to the means in accessing the assets, but i have been able to bulk extract competitors banner images but no copy. Its nice for that and for gathering your own material already in the correct resolution dimensions. Its all about speed anyways right.