don't know exactly... maybe 30 or 40... depends on what is Individual for you. I count only super-customized cars... Yes F03 is also available with Individual and Special Requests.
I have heard about this rule that you can refuse it. but I think this is not something for every customer - BMW offers SR only for those who orders 6th or 7th car in one place and committed about the choice. I think financing is a bigger problem - your bank will have to find another person who'd like to drive a taxi-colored 7er after 2-3 years... In RU most of them had been bought as outright purchasing...