I have been using the 22" cantilever boxes from Home depot for a lot of my smaller and more detailed/ fragile casts http://www.homedepot.com/h_d1/N-5yc1v/R-202021301/h_d2/ProductDisplay?catalogId=10053&langId=-1&keyword=cantilever+tool+box&storeId=10051 .

I also have an old 20 drawer steel punchcard cabinet that I have parts bins in, I could never find the correct bins to properly fit the drawers and utilize all the space until I found these bins from Schaller http://www.schallercorporation.com/servlet/StoreFront so I'm going to start reorganizing my drawers with these bins when I get my next order and hopefully use less of the cantilevr boxes as they are spendy.

I also have some of the larger stacking plastic parts bins for the standard fieldstone and gothic blocks. I like having all my pieces seperated into different bins so I can what I've got, but it uses a lot of space and bins which add up after a while. I have 8 of thoss cantilever boxes at $20 when they go on sale and $30 when they're not.