hmm, mabey a digital picture frame could be gutted. I've seen a few about that size at targate, best-buy, radioshack, ect.
Seems like those would be a bit expensive to just harvest screens from, plus the more affordable ones would probably be... not great. Then again, they're hella cheap in comparison to http://www.carelectronicsworld.com/68-7rawlcdmodules.aspx ... ho boy. I assume you need a far lower number of them than would be necessary to contact an actual LCD mfg?
frys electronics http://www.frys.com/ They Ship Everywhere but they have brick and motar stores all over the south west usa and there cheap and high quality