Amazon. Just a super cheap handlebar extender. I’ve had it for a year now and moved it over from my Bird ES1-300. Held up well, but I only have a light on it. Nothing too heavy duty. $15 CAD so very happy with it.
The light is also from Amazon. Had it less than 1 month so far so not able to review it in detail. It’s bright, but not as well focused as I would like. No top cutoff just a wide blast, which is much better than the super focused spotlight on the phantom. The external battery back lasts longer than the scooter battery so that’s never an issue. Cheap knockoff product, no longer available for sale right now, but once you have the bar on, you could use any light you want.