WHMCS Module for moving files

I would like a module that will show a drop down list to my clients with a list of themes. When they select one I would like the module to then pick up the theme ZIP file from a URL and place it in the users html_public folder (wordpress theme folder) and unzip it. I will be adding and removing themes so will need to update it. At this stage I just want to keep it simple but in the future I would want to create a better more advanced solution.