My Glass fenders had the front bucket area molded in. It would be easy to install the prefab fiberglass buckets but your painted right now so just be careful and then use black spray paint to hide your work..

You must grind a V at the edge and then lay some glass mat on the front and back. Two layers each side would do it and you can get all the stuff from Walmart. Just clamp it so it don't move, then mix the resin and Matt then lay it up and work the bubbles out before it drys. Spray paint black when done.