Linear Actuator [ modifying it for use with CIM motors]

Our team’s robot is highly based off the robot in three days design. The only problem is that one of main components is a a Linear actuator. The DART Linear Actuator is always out of stock. SO for the teams that have used a Linear c
Acuator before and have modified it for your robot, do you have any tips for tricks for a new team.

Do you have a supplier and part number for the actuator you plan on modifying?