Yes! However not sure you can get them on that side of the pond.
Really Useful Boxes. They are boxes which are … well, really useful.
The ones I use are 9 litre, sometimes the 4 litre which are the same but only half the height. Into these go 4 (or 2) 'Hobby Trays' These are divided into 15 compartments (5x3) which are 60mm square and 30mm high. All my stuff is now based 20mm or 30mm sizes! (so 9 20mm square for WSS, 4 30mm square for ACW, or 3 WMA 20x40). I have my 20mm/1-72 on pennies so they also go 9 to a compartment.
The lids clip on by the handles. They are strong, and they stack The tray plastic is 'soft' so don't scratch.
Because the 9 and 4 stack I have all my terrain in them. The fact the trays are seperarate therefore are not fixed means you have lots of room.
Your problem is the antennae – you can easily turn a tray upsideown to make a 'lid' – tip make a way to pull it up such as a piece of string threaded through for a handle!
I also use a 4l for my dice/equipment box.
I am slowly transferring all my stuff into them – the lipped lids for stacking makes carrying easy. Plus as they are A4 size you can keep QRS etc under the bottom layer.
This is my WIP box
link
I use the Lipped tray for brushes as it has long 'pen' compartments. Because it hangs on the tob, it creates room for the paint pots- which are higher than 30mm. The bottom layer has the current batches in- the compartments allow you to sort them and they wont get mixed up. It takes me literally 30 seconds set up/put away, and once the lid is locked in they are safe. Reference books can go in because of the gap afforded by the hanging tray.
Be aware the lipped tray stretches the handles over time, so they are loose if you don't have the lipped tray in.
Because of RUBs my wargames stuff is the most organised (only organised) part of my life!