I just picked up a used Series 1 top chest to match my old bottom cabinet. I did look at some of the Kobalt and Craftsman boxes, but didn't feel like the quality justified the price and I would like them to match. I have considered building a riser with a deep drawer the full width for either my cordless tools with a charging station, or just to hold hammers, prybars, other bulky items.
I keep meaning to check on the side cabinets and drawers at HF because I could really use the smaller drawers for measuring/marking/layout, drill bits, other tool accessories.
I have seen some boxes that the manufacturer made a slide out panel on the back to hold long tools. I think this was a cheap attempt to make the box 22" to get around the tariffs. If you have the space/need, this might work for you and you could put a 22" deep new top chest overhanging the back.