Alternative to suggested propulsion suite for experimental course?

[zack112]

Hello The experimental course requires user to get the E310 propulsion suite. Propulsion system : DJI E310 propulsion suite (four motors, four ESCs, and four propellers)

This is no longer available anywhere. What is a different option I can buy that can still work with the high fidelity model in the course? https://rflysim.com/en/2_Configuration/HardwareConfiguration.html

[RflySim]

https://rflysim.com/docs/#/en/3_Using/PixhawkHardwareSystem?id=hardware-system-composition-and-connection

[RflySim]

you can use any other propulsion suits to assemble a quadcopter. It is OK.