Seems we all have the same problems.
My solution was to store the Evergreen in cardboard bin boxes as per below link. I prefer to store them flat, as I found the strips can bend over time if kept verticle.
I also seperated the strips into to sizes and shapes. So I have a box for strip 10 and 15 thou. A box for 10 -30 thou and another for 40 thou and above. Then a tube, rod , angle etc. Plus I keep all the shapes and sizes In their own brand packing.
I Keep them on a shelf next to my work bench. It takes me all of 10 secs to get the size I want.
But the best thing i did was stopped buy Evergreen blind and on a wimp at model shows. Instead I print off a Evergreen prouct list do a stock check and take that list with me to the shows or mail order. Stops me getting 6 of one size and zero of the one im out of stock off!
usual diclaimer with shops