Jim,
I am partial to Avesta Metals stainless steel electrodes for all processes.
Partly because everything I have used works. Partly because one of their engineers, Mr. Chuck Meddows was a frequent guest expert on this forum before he passed on a couple years ago.
They will respond to your questions, provide hard and digital copies of all the data you need and the welding wires work!
Edit
http://www.avestawelding.com/http://www.avestawelding.com/pages/Page____2939.aspx.