lowish wattage controller with regen

hi all i had a 1kw controller that had regen braking,i swapped it for a 500 watt unit for better range,thing is the new controller has no regen braking option,has anyone a link where i can buy a 500 watt controller that has a regen option,ie ebay etc,TIA.

What is the max voltage you are looking for?
What kind of vehicle?

The Xiaomi M365 scooter controller is cheap and abundant: https://www.ebay.com/itm/284916660444
Fairly capable, (field oriented control, regen) and you can flash open source firmware if desired:
You can swap in a higher 100v capacitor, and change the voltage divider resistors for higher voltage operation.
just to name a few,

Also, the Flipsky 75100 is an option.

Edit:update links

its for my ebike and 13s 48v.

its a brushless controller i am after 48v and about 10-15 amps max current output,should of made that clear.