Solgar has a large variety of totally vegan amino supplements. But they can get expensive. If your trainer told you that and your trying to bulk up, the main one is Glutamine. It helps muscle recovery. Ornithine-Arginine supplements are also good for post workout. They help block free-radicals and replenish oxygen supplies after cardio. This is because a lot of marathon runners and cyclists get blurry vision. This stems from a lack of oxygen flow to the ocular nerve. So that's why Arg-Orn is a good choice. Carnitine works well to helps build muscle and burn fat. Taurine is good for energy. And if you get a cold, take Cystiene. It's the most common amino in Chicken Broth. It breaks up mucous, which is why chicken noodle soup is good for colds.
But the short answer is look to Solgar.
Wow you are really smart. Are you a Personal Trainer?