I am looking for a bunch of tiny lcd screens (the same type typically used in single line calculators, digital thermometers etc)
any idea where I can find stuff like that ? do any of them come with built in lcd drivers?
Digikey sells 7-segment LCDs with characters between 7-12 mm high, from a couple of manufacturers. I think you have to do your own driving (either use a driver chip or do a little analog stuff with an mcu).