Hey Brian my father and I both have a little flipdown holder screwed down to the passenger side.  Right down where the shifter cover meets the lower dash.  I was going to get you a pic, but the camera battery is dead.  IIRC we got them out of Victoria British LTD catalogs...when they used to have RX7 catalogs.
Here is just about the same one
http://www.amazon.com/American-Techn.../dp/B000Q86IQQ
I'm not sure about the one I linked but my father and mine work really well except for a couple things.   They're not made for "Lake o' Pepsi" large drinks so they won't hold those huge sodas that fast food joints sell.  Also they don't hold tall cups/bottles very secure.  There have been times I lost mine out of the holder going around turns.