Microshield is still available from Grove Engineering, 1700 Rockville Pike, Suite 525, Rockville, MD 20852, phone 301-231-5137. I just called this number and talked to a Grove Engineering representative. She assures me that Microshield is still available. The opinions expressed are strictly mine. It's not about dose, it's about trust. Bill Lipton liptonw@detroitedison.com