Anyone know of a supplier of "Starlock" push-on fasteners for metric square shafts?

[arcticXS]

I have been trying to find a source for a small quantity of "Starlock" (or similar) push-on fastener for square shafts, without much success.
Ideally 7 mm, but I could possibly use 1/4" instead. If any of you could point me in the right direction, it would be great!



See attached picture for reference.

 

[JOHNDADDY]

Didn't get to look at the sight but maybe