The recommended replacement offered by Molex is 638118700, DigiKey part number WM9017-ND and 638258800 which is obsolete , replacement offered by Molex is 2002187000 DigiKey part number 900-2002187000-ND
Can be verified on the product pages for the original on the Molex website.
Please review the datasheets to ensure the alternative will work for your application.