When I read "bottom and top" I'm thinking big lol sorry.
I picked up a nice Stanley set at wal mart. There's a base with two doors, a middle section which is just open, and I think 4 drawers, as well as the top opening. Also came with a whole ratchet set. Paid under $100 on special. It's not huge, but as a second box for me that I was just using at work it's pretty good.
Just buy any random box from Kijiji and buy a bunch of mastercraft stuff as it comes on sale.
Otherwise good luck in your search. If you want to spend thousands though let me know. A friend is thinking of getting out of mechanics and he has pretty much Snap-On everything and a nice Snap-On box. We're talking like $8k minimum though