Vostro 3490 replacement palmrest and keyboard: part numbers?

Hello,

My Vostro 3490 notebook has developed a crack in the palmrest part beside the keyboard which is getting worse each time the hinge is opened and closed. The laptop is out-of-warranty, but I am comfortable replacing this part myself. I am not totally confident I have found the correct part number through Google and 3rd party parts sites. Can someone assist identifying the right part?

D2JD8 looks promising, and some sellers provide a keyboard with the palmrest, which would be a nice bonus. But I would like some reassurance I have the correct Dell PN to order. Is this the right one? Thanks for the assistance all!