Post Workout Shakes are a matter of personal preference.
You can live without them and have a nice meal after your workouts.
If you(just like me) really want to have a shake after your workouts you could go for a vegetarian protein blend, sunwarrior is a great choice as well - like MF stated. The most consumed are pea protein, rice, hemp, soy or a blend
Check out www.veganproteins.com
and see some choices, they have good prices on their selection but there are cheaper brands available on other websites.