Thunderfoot
Hero
Are you referring to the Eagle Games version, or the Avalon Hill version? If the latter, I have a copy I picked up on eBay some years back. If you're looking on eBay, I'd include "Avalon Hill" or "AH" in your search criteria. Here's the link to one of the current auctions:
Civilization Avalon Hill - eBay (item 130478629796 end time Jan-28-11 10:57:15 PST)
Hope this helps.
That's it - thanks a bunch (See the intrawebs ARE useful)