Dear Ron,
I reached out to David Schultz at Seashell Technologies
I got the response below that said that they still have them and request a quote:
From: DAVID SCHULTZ <[log in to unmask]>
Hello Doug,

Thanks for reaching out to us. Yes, we are still supplying ballistic particles. If you would like a quote, please let us know the type and quantity that you want. Please note that the Minimum order quantity is $250.

The same particles are now supplied by a successor company, Critter Technology.

Kind regards,


Doug Chalker, Ph. D.
Dept. of Biology -- campus box 1137         Monsanto Lab room 304 (office)                                    Monsanto Lab room 405 (lab)
Washington University   
One Brookings Drive
St. Louis, MO 63130
office  314-935-8838; fax     314-935-4432
lab     314-935-7143
[log in to unmask]

From: Ciliate Molecular Biology <[log in to unmask]> on behalf of Ronald E Pearlman <[log in to unmask]>
Date: Saturday, December 5, 2020 at 8:27 AM
To: "[log in to unmask]" <[log in to unmask]>
Subject: A question

We have been purchasing gold particles for biolistic transformation from Seashell Technology Inc. Unless we are having internet problems accessing their www site, we are unable to reach them through their www site and the internet. Does anyone know if the company still exists or if someone else has taken over their business? Bottom line is does anyone have information about where to purchase gold beads at present?

We would be most interested in a North American supplier but any source that can be recommended would be appreciated.

Thank you.


             Dr. Ronald E. Pearlman           [log in to unmask]
           Past President and Advisor
           Royal Canadian Institute for Science (RCIS) 
           University Professor Emeritus and Senior Scholar
           Department of Biology
           York University
           4700 Keele St., Toronto, Ontario, Canada M3J 1P3
           Phone:416-736-5241; FAX:416-736-5698