I don't think gluing the old piece back on would work for long.
I bet you could fix it yourself with some epoxy , black and white fiberglass, a $3 chainsaw file and a little sandpaper. I won't be back at the shop for a few weeks but I could mail you the fiberglass to fix it . Let me know if you are interested in attempting it yourself.
Also the banner at the top of the page is the bow hospital, check them out , I hear they do amazing work.