Andy
I've got some, they are far better than the originals.
I bought them from Demon Tweeks, convex race variety 27.95GBP each plus VAT for the plastic version, CF type were about double in price and not that well finished IMHO.
I took the centre windscreen screw out fitted the mirrors through their top mounting hole with the allen bolt supplied, which seems to fit OK. I was going to drill and tap the pillar for the lower one but wanted to try out the position first without making extra holes, they're so firm I've not got round to finishing the job yet.
Mounting this way means you can:
1)Drive with the doors off and keep the mirrors.
2)Fold the doors and put then in the boot, just incase you get wimpy in winter.
3)Get no vibration in the mirrors and can actually see what’s behind.
Those who know me will confirm I am not supple nor practice yoga and suggest I would be better of with an SV. I can get in and out easily with the hood up and doors on even though I can't fold the doors back.
I found that you need to almost over tighten the allen screw that is at the back of the mount otherwise it gradually comes loose, which is annoying.
Andy