Having someone repair it will be expensive. Perhaps I can help you do it yourself.
If the crack can be squeezed back together, it can be glued. You will need to clean and degrease the crack, first. A can of spray brake parts cleaner (available at Walmart, or auto parts stores) will clean any grease or residue from the crack. Once it is cleaned and dried, apply the glue (epoxy is preferred) into the crack. Squeeze the crack back together and clamp it shut. Wipe off any excess glue and let it set for a couple of days. Remove the clamp and sand the handle smooth, if necessary.
Bill