[Boatanchors] Source for Spline tools Used on many control shafts and knobs

[Bill Mellema]

I am looking for a source to buy a set of "spline wrenches" that are used on knobs and control shafts of old gear. The end looks like a star. Maybe spline is the wrong term but it's what I've know them to be called. I need a small size to remove a control from the shaft. I have no idea what the spec is.
Does anyone know of a source for a set of these?

Thanks,
Bill N3WM