Storage boxes from fishing or craftwork section of a Walmart or similar store; about $1-6 each for 10+ compartments.
You needn't store every single Ex value in a its own bin. You need one set of E12 precision components to use for testing designs [1 or 2 Plano boxes worth], then buy fresh parts for final assembly. If you try to stock parts for future designs you know nothing about its bill of materials, you'll soon have an inventory problem, too much of something, too little of another, and a lot of space used that can be purposed for something else.

Note, that's one box for resistors, capacitors, inductors, ICs, etc., so it does add up. Trying to stock what you don't know you need yet could turn your workspace into a Digikey warehouse.