What are they, well they are replica countach rear cooling vents, quite large and made from welded aluminium. They have a lip on one side and two threaded nuts on the other so the vent can be clamped to a glassfiber or ally panel. Very well made and no damage, I grit blasted and then sprayed with gray primer. Note they are NOT rectangular but are slightly tapered. I can post more pictures and get dimensions tonight.
£40 the pair, at a guess £5 to post on top of that.
Rescued attachment side pod.jpg