Hey Brion,
The wire rope was sourced from the same company that supplies the entire Belgian commercial fishing fleet. Not sure if that is of any use to you though
As I noted earlier, the price of the terminals for galv wire was completely out of my control and a bit unsettling... I had a harder time finding a place to terminate the stays than I had finding a supplier for the wire. The company I got the wire from couldn't even terminate it, and it's only 8mm, go figure.