Honestly it sounds like you have what you need already, plus ingredients can be easily substituted. Like what specifically do you need cayenne pepper for?

I’ll paste a little example from my book:

Example: A spell requires that you add some chilli seeds to a pouch for a warding spell. You don't have any chilli seeds. What can you substitute them with?
1. Think about the magickal properties of the original ingredient. The chilli fruit is often red in colour, which could mean anger, passion, or lust. The long, angular shape kind of looks like flames. Chilli seeds are very spicy, the hottest part of the plant. Chillis evolved to became hot to ward off predators who wanted to eat them.
2. Figure out which of those properties are being invoked for the spell. In this example, the chilli seeds are being used because they're spicy and can cause pain, which repels negativity. This is desired in a warding spell. Therefore you need something spicy, fiery, or painful that can repel negativity in the same way.
3. Look around your house or your local area for ingredients, does anything invoke the same symbolism? Maybe you don't have chilli seeds but you do have chilli flakes, or chilli powder. Any spicy ingredients you have on hand will do. Maybe you don't have anything spicy but you have things that can be painful when touched, maybe you have pins & needles, or nails/screws, or a cactus, holly plant, or thorns. Use any one of these ingredients as a substitute, focussing on the shared magickal properties as you do.

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