How to I autofill a field?

Hello I am creating a form and there is a section called SKU that is a search bar so i have to search for a part number and select one. Below I have a section to add the urls of the listing I created for that Item. How can I auto fill on the opposite side the urls that I have already submit to avoid doing double work.

Example

Sku: W10130913                                                                  URLS
Amazon _________________                                       Amazon __________________________________
Ebay ___________________                                        Ebay http://www.ebay.com/sch/i.html?_from=R40&
Personal Site_______________                                    Personal Site_______________________________

This way once the number is selected in sku I already know that I input the information for ebay.