My carbio dash lower edge passed IVA. I used 15mm foam pipe insulation (about 55p for a metre length from B&Q) and covered it with black leathercloth to match the dash. Its got a ready cut slot in it so it was a matter of pushing it over the bottom edge of the dashboard. I glued it on the back so that it could be removed later without damaging the front of the dash, but it looks good enough to remain.
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