Sure, you can buy pasteurized eggs at the grocery store. But if you only need one egg for a salad dressing or homemade mayo and you already have a sous vide setup, it's easy to make them at home.
Fill the cooking vessel with the hottest tap water you have.
Set the immersion circulator to 135 degrees F and turn it on.
When the temp hits 135, add the eggs in a single layer.
If the eggs are banging into each other, you can place them in the plastic basket that came with your salad spinner, or wrap each egg in a piece of cheesecloth and secure it with a rubber band.
Cook for 2 hours.
Shock in ice water and chill.
The Johnson Family Cookbook