This is to Laurie,
As fate has it I was just talking to the person who works for VWR, 
and I asked them about getting more slide holders, they stopped 
making the green metal handle ones now there grey and they hold
24slides and are microwave able..... I told them I want the green 
ones ....back...... I'm with yea.....  Were both out of luck...
sheila.cleveland@orst.edu
P.S. my book was two years old. now im getting a new one......
Sorry for giving you old advise that will teach me alesson.