Yes, there is a third seat available for the '95 Eurovan Camper. It was
part of the optional camper equipment available for the vehicle. If you can
still get one, it would come from Winnebago, so your local Winnebago dealer
should be able to check if one is available. The seat adds two seating
positions and can be installed facing front or rear. When it is installed it
blocks access to the fridge. It connects to the bars in the four recesses in
the floor which are covered by rectangular covers.
    It may be that someone has one of these seats that they don't use and
would be willing to sell. You might try posting to the Eurovan list. See the
Weakly Statz for info on how to access the list.

Marve
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'95 EVC