Molex 638110800 obsolete crimp tool replacement.
The recommended replacement offered by Molex is 638190100 also obsolete
The recommended replacement offered by Molex is 2133091200 DigiKey part number
900-2133091200-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.