As for the Thai Red Curry Paste, there are many benefits to make your own Thai Green Curry Paste:
the flavors are incomparable, you know the ingredients that compose it and you can moderate the spiciness according to your taste.
Those you can buy are often too spicy, it may dissuade you to use the correct dose, as a result the dishes will be either bland or too spicy.
You can stored it the refrigerator for several weeks. Bon appétit.