VIRTUAL PAGES-Wordpress theme modification/plug to create VIRTUAL PAGES. To be able to send custom URLs that go to the same virtual page

MUST HAVE VIRTUAL PAGE EXPERIHENCE, no guessing or trying please i need a wordpress expert who has done something like this before. Hello, I need a wordpress expert to help me create the ability to send business name specific URLs to people but the URL goes to a "Virtual Page". The /busienssname specific page does not actually exist on my wordpress account, instead it looks to the viewer like a real page but instead all viewers are seeing the same page. Example: I need to send 200 builders a prospecting email. I want it custom so i want to send: "Hi building company XYZ please see proposal I have made for you here [login to view URL]" this URL would take them to a master page that is defined by the /kb/ section. So ANY url/name after [login to view URL]"insertname" would go the same generic page for builders. I need to be able to do this process myself in the future, so i need a plug in/changes to my theme/help in doing this. Please explain in your bid/proposal/ideas for completing this. Thanks, Scott