Tissue Pulverizer - Commercial Source?

[A John Watson]

Greetings.

In the past, I have used stainless steel puulverizers (they look
sort of like mortars and pestles) to disrupt solid tissues prior
to RNA/mRNA extraction. For me, such pulverization is essential
for efficient extraction from vascular tissue (for example).

Does any one know of a commercial source for these implemnents of
destruction?

Thanks,

John Watson
Bristol-Myers Squibb Co.
Wallingford CT 06492
watsonaj at bms.com