Updating Pricing Markup

Hello,

I’d like to update the frontend template html markup for selecting a package within the prices and payments add-on so I can style it properly. What is the best way to do this without things breaking if I update the plugins? I can add the styles to my child-theme but not sure if I should create a new template within the plugin, if I need to copy plugin files into my child-theme then modify, etc.

Any help would be useful.

Thanks,
KWIT