I've had the hitch for years and have only used it for hauling bikes so no lights were
needed.

I plan on hauling firewood etc so I need to complete the package

Rich

I just picked up a complete wiring set (module, wire harness, and plug) from ECS for 176$ :) its for a customers X3, but the installation was similar (module is in a bit easier location etc)
I grabbed my hitch, module and harness from a wrecker locally for about $100 (I did the removal!)