Cabin air filter

Hi all - I've got a '97 GS and need a replacement part, but I'm not sure what it's called. The item in question is the black plastic baffle/vent that fits directly in front of the cabin air filter. It sits under the cowl, and slides onto the filter mount. The local dealerships in the area are clueless as to what it is called and it's difficult to determine the correct part based on their computer order page descriptions. Any information, or a part number, will be appreciated. Thanks!

The following link (borrowed from a fellow member) shows the item I need. The piece is in the middle of the picture. It's black and dusty, with a few vent openings on the right side.

http://www.picdump.org/d/81419-3/100_0045small.jpg?g2_GALLERYSID=026e24413ba34bdbcf ab991097fb9185