If I had a sample or drawing I could make them on my CNC Lathe.
I can send out for the heat treat.
Spline is the only annoying part but I do have an indexing head.
Betting I can do them for a LOT less than Dutchman.
I sent him a PM, not sure if he is active here, last post two years ago.
What he did is very similar to what Lotus Supplies were offering at one time.