As tedious as it might sound, if I were you, I would just get all the packages and reinstall all of them in your new OS. This would prevent any problems in the future.

Consider what happens when you copy the packages to your new OS and you think that everything is 'okay'. When you write your new script and it is dependent on these 'copied' modules, and it breaks. You will always have this at the back of your mind whether the script broke because of the 'copied' modules.