I haven't checked lately, but my past experience is that ComEd can do it for less than I would want to. Especially nice is the fact that they will also be responsible for the installation. You wouldn't want to do this one over on warranty.
If you decide to do it, you might be able to glue the PVC together at grade, pull the wires through, then glue the PVC elbows on & slide it in the trench. That way there is no burn through & no bonding issue.
Dave
