Product review (5 stars): Yep, this is a Whirlpool Dishwasher doorhandle.
Drop in replacement handle.  I still think the original handle design is flawed, and the price Whirlpool wanted for this was ridiculous (a $45 hunck of plastic).  However, the price for the part was much more reasonable from this vendor.  It only takes about 10 minutes to remove the old one and install the new one.