If you are using a decent wet gutload, which is way more laborious than a well thought out dry gutload ( I use both ), then you don't need a ton of stuff. Get some bee pollen, alfalfa powder, spirulina, add those things to a decent dry baby cereal and you have start. Avoid items like powdered milk, grains, and human vitamins.
When you look at a gut load recipe, mentally pick out a few ingredients that do what all the others do, for example alfalfa powder is your protein, so no need for hemp or other protein sources, bee pollen is full of vitamins, so that covers you there, now you're looking to add perhaps calcium, antioxidants, or specific nutrients, such as Vitamin A, so choose another ingredient or 2 accordingly. You can make a decent gutload with a trip to a decently equipped, though not specialty or super fancy grocery store. You could probably find a friend to order and split shipping with on a ready made gutload. It's far simpler, in my opinion. You don't want to know what I use and have to grind and chop to make my gutload.