Are there any female models on MM that sell custom photos & videos?

No doubt there are hundreds. Easy way to find out is just ask any model you want if they will. And I'm not sure if it's within the rules but if so you could create a casting call and ask. Certainly there are photographers who would sell them to you. And usually the photographers hold the copyrights unless a model self creates something for you. Many models have been advertising castings for remote shoots which would be an avenue to pursue.

A lot of the members on this site have stuff here..
https://bentbox.co/cover

Probably all of them would if the money is right and if it's within their comfort zone what you want to see.

Seems a silly question actually.