I wonder why you would have problems with ur DS's... maybe your name has something to do with it,
MUDDY Rick is right about Quigley's, but you're living in Tenn aren't you? You could still have them build you Drive Shafts and ship them to ya (they did a great job for me on both of mine). Once you get ur DS's rebuilt, or replaced, you NEED to service them after each trip into the mud, water or a hard Off-Roading trip.
Hope this helps. Take Care Jon.
Jack