teflon tissue grinders

[Hiranya Roychowdhury]

Hello,
        I am looking for those teflon-tipped tissue grinders that work with microfuge tubes. These are conical (smooth at the tip, not truncated) teflon heads that come with stainless steel handles that screw into the heads. I have been unable to locate them in either the VWR or the Fisher catalogue. If any of you know of a supplier/manufacturer here in the U.S.,I would very much appreciate a short note.

Thank you,

Hiranya.

Dr. Hiranya Sankar Roychowdhury
Plant Genetic Engineering Lab.
New Mexico State University
Las Cruces, NM 88003
Ph. (505) 646-5785
hroychow at nmsu.edu