If you haven't ordered them yet, these would work.
http://www.createforless.com/Westrim+Chinese+Take+Out+Box+Plastic+Large+Frosted/pid122849.aspx
Remember to remove the silver wire and make your own using stainless steel wire.
thanks kashta, but i actually prefer the others, because they come solid white. (it would be more authentic) plus being porcelain, they would anchor themselves down with/without gravel inside. thanks anyway. i will in fact replace the wire with stainless steel though, thank you for that, i was unaware how metals would react in water.