Making a cheap rolling spice rack that will fit between a refrigerator and a cupboard
Here's a link for you, Bridget:
Bridget this said food, but spices would fit! Hope this helps! https://www.hometalk.com/27153769/slide-out-food-storage
1 by X lumber is pretty inexpensive depending on the opening. I'd build a box with some cross shelving and rails (so items don't fall off) then add wheels to the bottom so it rolls nicely.
Maybe try buying 1!!???