Hey desertgirl, are you attached to desertdude? Let me know, if you are I've got some info you might like and would give you both an excuse to hang at the Sedona Arts Center for a weekend.
Best answer for your question is ebay, or one of the many places to sell your gear online.
What you need to answer is why do you want MF digital and what are you expecting to get from it that you can't get from your Canon system? What kind of budget are you looking at?
Bill
aka bigreen505 at a site run by a guy named Scott.