Most of the cost appears to be the module itself.
The LEDs look like they are wired in series, but it is hard to tell.
They are also high power LEDs. You may burn out other LEDs if they are not high power.
The connection to the Lunar Sim Module controller looks just like the Lunar Links connector, I am not sure if it is the same size.
So if you can get a Lunar Sim Control module somewhere, you may be able to just connect the Lunar Links. You may also be able to splice them inline with the existing ones.
However, this is pure speculation on my part.