Well, I'm shopping ;-) that's exactly what I did when I broke it ... ease the main with the spinnaker up in a blow. I liked Bill's suggestion about running backstays, although they are messy and extra crew-work.
I'm planning to keep the rotating feature. It will require cutting away a small amount of the deck around the notch where the old mast went through, to keep the deck out of the way. The mast step should not be a big problem if I attach a small stainless plate to the keel which can accept the bolt for the rotater ball.