G'day Nick

A small stone in a drill also works but I've also used Sutton High Speed Steel drill bits to drill broken drills,broken easy outs,
high tensile bolts ,spring steel ,stainless ,hardened steel axles, mower blades, etc, Once I couldn't drill a truck clutch fork
but it didn't have a hole to start with so I took it to a shop to drill which they didn't charge me for.

You just have to keep sharpening the drills.

I did see some other blades but would require more work as both ends would need cutting and will need a new hole drilled,they were
1/4 inch thick.

The step in these blades is 22 mm but you really need to see them to know if they can be modified as they are longer
https://queenslandtractorspares.com.au/product/gessner-156-and-216-stepped-down-slasher-blade/

Cheers
Max.

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