I need the center support for the air filter for the 350 D. I have the box that supports the side panel but the filter support has been knocked out. It has an oval hole in the back for the rubber boot attachment.
If it's the bit I am thinking of I imagine it would be quite easy to fabricate an identical piece. Do you have a photo of the box with the bit missing? You may have to try to get a complete box to match yours.