The first company that came to mind is Mopec, 13640 Elmira Street, 
Detroit, Michigan 48227  phone # 1-800-362-8491. The product 
number for the complete set- 30 slide capacity is BG001. There are 
probably other companies that sell these dishes and lids but I don't 
know what they are off the top of my head.
Have a good one!
Kathy
                Thank you 
 Kathy Oprea                     
 University of Georgia          
 College of Veterinary Medicine  
 Athens, GA 30602-7388           
 KOPREA@calc.vet.uga.edu         
The worker who's never said "Thank
God it's Friday," probably never
really worked.