They do look like they would be difficult to repair to exactly as they were brand new. Repair would require a small off the surface shaved away which would leave the groove in the spokes less pronounced. They the black portions would need repainting too.
A repair is likely to be a whole lot easier if you were OK with the groove being less pronounced and the whole wheel painted black.
But best sent a query to the likes of Rim Solutions or Lepson's