The search term that works well is "seville storage cubes" or seville storage grids. I hear what you say about wanting to make it yourself. If you buy from alsogrendle seller on ebay what you get is a box of grids, cable ties and connectors. So you would still be building it yourself (if you want correx you have to buy that separetly. I Can recommend thealuminiumshop seller on ebay - that's where I got mine).