Almost perfect! I couldn't get it to work initially. Struggled for about 20 minutes and figured out that there's one additional requirement.
sudo cpan Mozilla::CA
Thanks for the awesome workflow.
https://github.com/phpfunk/alfred-tunnelblick/tree/v2 -- It appears to be updated.
To grab it:
git clone http://github.com/phpfunk/alfred-tunnelblick.git --branch v2
cd alfred-tunnelblick && open Tunnelblick.alfredworkflow