Changing select2_ajax to text field but keeping the funtionality on WordPress

I need some help with a WordPress site, I am a beginner at javascript/ajax so any advice would be brilliant, it uses the Noo JobMonster theme and uses select2_ajax field when creating a job for selecting a company from the company list built into the site and uses this information to display the company details on the job page, is there any way to change this field to a text field but keep the functionality of it searching and selecting the company from the company list and displaying it as long as the names match, this is because we are going to be importing an xml file of jobs from a different site and not sure if the field will connect up and will work the current way.

Here is a link to one of the job pages: https://www.edijobs.co.uk/jobs/customer-service-administrator-tpcsa150322/

job company screenshot

Thanks