Hi, Peter Thomson from Sydney Stereo Camera Club. I have been looking
for a suitable plastic box for MF3D slides and finally came across this
little beauty : see them here -
http://www.flickr.com/photos/14946872@N04/?saved=1

They are from New Zealand company, Click Clack, and they have agencies
all over the world, including the US.
http://clickclack.com/cc/product.asp?productgroupID=356
As you can see, the height and length are pretty spot on, width allows
for 30 slides. I have just bought 52 from the Australian agent for
$6.60 each including freight.

Also, I am organising a cardboard/paper box to fit 12 slides, to be
made in China. Is there any interest in such a box?

Happy 3D-ing, Peter