[Denying]

You could make it by yourself. Shouldn't be too hard. Add tree objects, save their IDs in an array or whatnot and check if a player types /chopwood in range of any of these objects while holding a chainsaw. Then just apply the animation and attach the object after a given time.

Functions you'll need:
IsPlayerInRangeOfPoint
ApplyAnimation
GetPlayerWeapon

And some more to create and attach the object. Honestly, this shouldn't be too difficult.