Hi Rayden, I do not think there are any standard replacement KH handles but www.municycle.com sell a handle that I understand fits the KH. Unfortunately yellow is the only colour at present but Roland says he has not heard anyone break one yet.
Simon
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I'msure to fit the handles to the Velo freestyle, you'd need to unstaple the cover as there's only two bolts to hold the freestyle bumper on and you need four for the KH handle. And I'm not sure there's a stiffener plate in the Freestyle, though I could be wrong. Why not buy a regular KH with a handle included?