****edit***** just remembered it was Mark Bland (engman) that was making these, sadly Mark passed away a while ago.

Starting to work on the AX car for the up coming season. Before I go make up a cover, I thought I seen where some one was selling cover / block off plate for where the defrost connect to the under dash area.

This is the area I am asking about.
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Mark's product
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Nice pieces but I have to admit I just put that Aluminum duct tape for house heating HVAC ducts over the holes on my car. Pretty ghetto but ...

That is what I am going to do for now, but will make some covers later.

Garold...I've used roof flashing in aluminum and galvanized steel on race cars...thin, light. and easy to work with....