Found this link to the exact same mirrors that I bought for my series one, 20 years ago when in the UK.
Very good quality and mine still look like new, after washing the Piwe poo off them this season, so have a look, but they cost more than the 8 pounds that I paid at the time.Time moves on and so do costs....

The link is Land Rover Series 1-2a Guard Mount Mirror - eBay Boots, Exterior, Car Parts, Accessories, Cars, Bikes, Boats. (end time 11-Sep-10 15:35:30 AEST)