Build a Single page with Embed code from other Site

Project Description: A third party webpage(needs user to be logged in) uses a price calculator with some set of values as inputs using .aspx. i want that calculator to be used to my webpage(design a single page having only calculator with all the necessary input fields from that third party page) . I want that calculator script to be embedded in my webpage. Third party link [login to view URL] . Click power standard/power Express