Well I've gone and done it, if only to report what they're like. If they're cack then it's not the end of the world, if they're ok then winner!
They're branded as streetwize and come with about a dozen adapters so they'll fit quite a few models.
Fitment wise they're opposite to the OEM, in that where you press the tangs in and then rotate the fitment towards the end of the arm, with these you fit at the tang end first (not really tangs but interference fit) and then rotate the fitting towards the end of the arm where 2 tangs click over the tongue of the arm. It's not amazing but it's secure
They clean better than what I took off, so that's a good start. I'll report back once I've used them in anger on the motorway.