1)No idea, but google is your friend ;-)
2)They are OEM fit on my car, and have been since 2006, first with Bridgestone RE-050A 's, now with non-rft Continental SC3's, and they're still round and true, despite our roads resembling a third world dirt road.
3)Finish is very good and motorsport logo stays on, even with pressure washer. When my fronts where refurbed (curb damage, not by me), the logo was gone, but I sourced new logo's via Ebay, applied them and they have been fine ever since.
4)Yes, I think they look great (that touring car look). One reservation: there are easier wheels to clean.