Ordered new glass top via AppliancePartsPros at a significantly lower delivered cost than from Whirlpool. Cross checked with APP using online chat before ordering so that delivered cooktop part was exactly the same as the broken one. After looking at a how-to video on Youtube, removed a few screws and installed the new part in a few minutes after cleaning up remaining broken glass. It was perhaps good luck that local parts warehouse was nearby because the part arrived the next day.