Perry, I fitted a cowl scoop to my plus 8 yesterday. You can buy a mild steel, black painted version from Morgan for £84 but I opted for the stainless steel version as it won't rust like the steel one. More expensive at £180 Inc vat and available from Heart of England Morgans:
http://www.heartofenglandmorgans.co.uk and under bonnet fittings. It was a bit fiddly to fit (refitting the grill and mesh) but not difficult.
