Growing Containers!!

[awb at aber.ac.uk]

I need a plastic petri dish or trough (lid not essential) like container for 
some experiments on Arabidopsis.  Ideally it needs to be square/rectangular, 
but the main constraint, which rules out many square petri dishes, is that it 
needs to be less than 7.5cm wide. Plastic would be best and ideal dimensions 
would be: 11cm x 7.5cm x 1.5cm.  Does anybody know of a supplier of any 
suitable consumable??  Please email me if possible.

Thanks
Andy Berry
University of Wales, Aberystwyth
awb at aber.ac.uk