SMoules,
If these are truly OEM quality (the pictures look good) and work as the OEM ones do, you've found an outstanding option to the DIY conversion. I just recently installed my OEM converted set and they're nice, but it was a lot of work hunting down the non-powered version for the bases and the proper (used) powered ones for the arm and mirror head, then doing the conversion work. I figure I have about $220 tied up in each of mine so these Kool Vue mirrors are a great bargain.
Wish I'd seen these 4 months ago!
-Jay