Cooling System Too Good?

[coldwar]

Now that temperatures are below freezing here in the North Country, my 300D never warms up! Drove it 80 miles last night, and the temperature guage barely got off the peg- stayed below 100. Normally in warmer weather, it runs just under 175. I plan to store the car for the winter, beginning first week in December, so that leaves me with a few weeks of cold driving. Does anybody have an "elegant" way of creating a radiator blind? I was thinking of simply duct-taping a piece of cardboard behind the grille (a truly "Canadian" solution to everything!), but wondering if there might be a proper kit available for doing this? As creative as Red Green the duct tape king is, I would be afraid that cardboard might blow off.