Thanks. I'm pretty sure this is what I'm handling or possibly a variant of it. And we are an Acuity Brands OEM, so getting more of the complete assembly is no problem. However, our distributor price is actually quite a bit more than what you've linked.

To load-up on the cables next time I'm in europe might be an option, but building the cable ourselves sounds better to the guys here. If the connector is proprietary, then we may have no choice.