As an online publisher, one of our programmatic ad partners is requesting that we have a different html.tpl.php file for responsive screen sizes. 

We have a drupal 7 website that one of our ad partners is creating programmatic ad scripts for and would like to send us script for specific screen sizes. Usually this script would be placed in the html.tpl.php file but this partner is asking us to place desktop ad script in a desktop and separate ad script in a mobile 

Is this at all possible? Our template is mobile responsive and only has one html.tpl.php file.