Gerber carbide cutters breaking

In looking at the Gerber inserts versus off the shelf tool steel or carbide inserts the difference I see is that the Gerber has the little notch to hold the wire while cutting. Not sure if that is necessary or not.

With the Gerber replacement blades you get the wrench and replacement screws as well.
Did someone make tool steel inserts for the Gerber multitools? If so, where can you find them?
 
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