Is the six sided shaft a solid piece of metal? If it is, what is the size of it? It may be possible to use a threading die to cut threads on the shaft the same size as the threaded handles that are available, then all you would need to do would be to screw the new handle on the now threaded shaft. I'm just throwing this out there, as I have not seen any photos of the problem parts.
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Bob & Becky
2012 3402RL
2012 Chevy 2500HD D/A CC 4WD
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