John,
I bought a 3m 7000 series full face respirator off ebay brand new for $40. I think it retails for $220 or something like that. It's great when your grinding, and has all kinds of filters for different applications.
I used this site to order all the extra stuff I needed. They were great to work with.
http://www.indlsafety.com/catalog/default.asp
[ November 25, 2003, 01:52 PM: Message edited by: Rich ]