Tom,
I know that you didn't ask about this, and don't need unsolicited advice, but I had a close family friend whose Lupus symptoms have left her for approximatly six years now since she began making dietary changes. This may not be a one-size-fits-all approach, obviously, but she based much of her initial changes on the book, The Maker's Diet.

http://makers-diet.net/

I don't know much more than this, but there may be something there that may be of help to you.

God bless,

Phil G.