There could probably not be a more difficult piece to find in the wide world of action figures than that of Louis Tully. Research into the availability of such items can be broken down into three realms of existence.
The first line of items will be based upon the original movie Ghostbusters and Ghostbusters II. The second line of items will be based upon what is called The Original Ghostbusters which ran as an animated television series. In 1997 a second television series ran under the name Extreme Ghostbusters.
Louis Tully remains a heroic figure to paranormal activity nerds and accountants everywhere, even though he may not have always been center screen, but it makes the items related to his character much more collectible.
ghostbusters Louis Tully, 2