Looking for prepared tissue slides

[Dan Pepper]

I need to find a source of prepared microscope slides containing sections 
from a variety of rodent tissues (preferably prepared from frozen 
sections); they'd be used for immunohistochemistry.  I recall getting these 
from a company some years ago, but can't recall which one.  Any help would 
be appreciated.  Thanks,

Dan Pepper
dapepper at alonline.com