I also like having an onion stock powder in my pantry, but for a while it kind of disappeared off the shelves. We have a local producer that makes stock powders without preservatives so to make up for the lack of onion, I just chop and cook a couple of onions to death (almost) to get the concentrated flavour before adding the water and vegetable stock powder. I do, though like your addition of garlic and paprika. I must bear this in mind, thank you @goldendawne