Urgent - Fan Snapped on UR10 Robotic Arm control box

Good afternoon,

My team recently began working with a UR10 arm on my campus. The fan on the side of the box with the metal plate that has four screws has no filter or cover. Because of this one of my group members cut his finger and the fan snapped while he was resting his hand on it.

Two blades were knocked off. I want to know what I should get to replace the fan as I was having trouble finding the exact model used. How should the control box be taken apart when replacing the fan? I would also like to order the filter and the filter covers as currently it is just an open intake fan.