Need Help with Making Custom Darksaber Blade

I collect Legacy Sabers and I display them with custom blades made from TCSS parts that I wired to some transformers plugged into a switched outlet. It's been very simple to do, relatively cheap, and looks great.

Got the Legacy Darksaber this weekend. My regular method obviously doesn't work because I'm no longer dealing with simple tubes. I've looked around various dealers and all the Darksaber blades I've seen are made for non-Legacy hilts so I can't be sure they'd fit right. Does anyone know where I can get a blade designed to fit into the Legacy saber, or something close enough in size? The electronics of the blade are irrelevant because I'm going to tear them out in favor of my own.