I make these nesting cup type products to fit dewalt, stanley & milwaukee organisers. Might be useful for lego if anyone is interested:
The stanley deep pro organisers are the best value as you can pick them up for around £20 here in the UK.
https://www.ebay.co.uk/itm/203915639478
https://www.ebay.co.uk/itm/203914705013
https://www.ebay.co.uk/itm/204280172695