I am looking to built a vending machine type solution where a internal
robotic arm (or similar) is able to pickup up small boxes which are
about 14cm x 18cm x 2cm (just approximate)(weight of each less then
400 grams) - several hundred of these - and drop in a chute and also
be able to pickup up from a 'insertion window' these boxes and place
them in pre-allocated slots inside the vending machine (i.e machine
acts both for dispensing and storing). The 'small boxes' will be
barcoded and be read on insertion and dispension.  I am looking for as
many names/web sites of manufacturers of robotic solutions which have
suitable solution - commerical type equipment (i.e. not hobby
equipment level) - preferbly ones which perform exactly as per above. 
I am not looking for the metal shell - just the 'internals'.
I have searched the web and have found lots of robotics equipment
suppliers around but not something fitting what I am looking for.